This sausage casserole is a comforting and hearty dish perfect for any meal. The combination of savory sausages, aromatic onions and garlic, and a rich tomato base makes it a family favorite. It's easy to prepare and bakes to perfection in the oven, making it an ideal choice for busy weeknights or a cozy weekend dinner.
Most of the ingredients for this sausage casserole are common pantry staples, but you might need to pick up a few items if you don't already have them. Diced tomatoes in a can and chicken broth are essential for the sauce, while dried thyme and dried oregano add depth of flavor. Make sure to check your spice rack and pantry before heading to the supermarket.

Ingredients For Sausage Casserole Recipe
Sausages: The main protein of the dish, providing a rich and savory flavor.
Onions: Adds sweetness and depth to the casserole.
Garlic: Enhances the overall flavor with its aromatic qualities.
Diced tomatoes: Forms the base of the sauce, adding a tangy and slightly sweet flavor.
Chicken broth: Adds moisture and enhances the savory taste of the dish.
Dried thyme: A herb that adds a subtle earthy flavor.
Dried oregano: Provides a slightly bitter, aromatic flavor that complements the other ingredients.
Salt: Enhances the flavors of all the ingredients.
Pepper: Adds a bit of heat and enhances the overall taste.
Technique Tip for This Casserole
For an extra layer of flavor, consider deglazing the skillet with a splash of white wine after sautéing the onions and garlic. This will help lift any browned bits from the bottom of the pan, adding depth to your sauce.
Suggested Side Dishes
Alternative Ingredients
sausages - Substitute with ground turkey: Ground turkey is a leaner option and can be seasoned to mimic the flavor of sausages.
sausages - Substitute with vegetarian sausages: For a vegetarian option, use plant-based sausages that provide a similar texture and flavor.
chopped onions - Substitute with leeks: Leeks offer a milder, slightly sweet flavor that can complement the dish well.
chopped onions - Substitute with shallots: Shallots have a more delicate and sweet taste compared to onions.
garlic - Substitute with garlic powder: Use garlic powder if fresh garlic is not available, though the flavor will be less intense.
garlic - Substitute with shallots: Shallots can provide a mild garlic-like flavor with a hint of sweetness.
diced tomatoes - Substitute with crushed tomatoes: Crushed tomatoes will provide a similar texture and flavor to diced tomatoes.
diced tomatoes - Substitute with tomato sauce: Tomato sauce can be used for a smoother consistency and similar flavor.
chicken broth - Substitute with vegetable broth: Vegetable broth is a great alternative for a vegetarian version of the casserole.
chicken broth - Substitute with beef broth: Beef broth can add a richer, deeper flavor to the dish.
dried thyme - Substitute with fresh thyme: Fresh thyme can provide a more vibrant and aromatic flavor.
dried thyme - Substitute with dried rosemary: Dried rosemary offers a different but complementary herbal note.
dried oregano - Substitute with fresh oregano: Fresh oregano can enhance the dish with a more potent and aromatic flavor.
dried oregano - Substitute with dried basil: Dried basil provides a sweet and slightly peppery flavor that pairs well with tomatoes.
salt - Substitute with soy sauce: Soy sauce can add a savory umami flavor along with saltiness.
pepper - Substitute with cayenne pepper: Cayenne pepper can add a bit of heat along with the peppery flavor.
Alternative Recipes Similar to This Casserole
How to Store or Freeze This Casserole
Allow the sausage casserole to cool to room temperature before storing. This helps to prevent condensation, which can make the dish soggy.
Transfer the casserole to an airtight container. If you don't have a container large enough, you can use a casserole dish with a tight-fitting lid or cover it tightly with aluminum foil or plastic wrap.
For short-term storage, place the container in the refrigerator. The sausage casserole will keep well for up to 3-4 days.
For longer storage, consider freezing the casserole. Divide it into individual portions for easier reheating. Wrap each portion tightly in plastic wrap and then place them in a freezer-safe bag or container.
Label the containers with the date to keep track of freshness. The sausage casserole can be frozen for up to 2-3 months.
When ready to reheat, thaw the frozen casserole in the refrigerator overnight. This ensures even reheating and maintains the texture of the dish.
Reheat the casserole in the oven at 350°F (175°C) until heated through, about 20-30 minutes. If reheating from frozen, it may take a bit longer. Cover with aluminum foil to prevent the top from drying out.
Alternatively, you can reheat individual portions in the microwave. Place the portion on a microwave-safe plate and cover with a microwave-safe lid or another plate to retain moisture. Heat on medium power in 1-2 minute intervals, stirring in between, until hot.
How to Reheat Leftovers
Oven Method:
- Preheat your oven to 350°F (175°C).
- Transfer the leftover sausage casserole to an oven-safe dish if it's not already in one.
- Cover the dish with aluminum foil to prevent drying out.
- Heat for about 20-25 minutes, or until the casserole is heated through.
- Remove the foil for the last 5 minutes if you want a slightly crispy top.
Microwave Method:
- Place a portion of the sausage casserole in a microwave-safe dish.
- Cover with a microwave-safe lid or plastic wrap, leaving a small vent for steam to escape.
- Microwave on medium power for 2-3 minutes.
- Stir the casserole halfway through to ensure even heating.
- Continue microwaving in 1-minute increments until heated through.
Stovetop Method:
- Place the leftover sausage casserole in a large skillet or saucepan.
- Add a splash of chicken broth or water to prevent sticking and to add moisture.
- Cover and heat over medium-low heat, stirring occasionally.
- Cook for about 10-15 minutes, or until the casserole is thoroughly heated.
Slow Cooker Method:
- Transfer the leftover sausage casserole to your slow cooker.
- Set the slow cooker to low heat.
- Cover and heat for 1-2 hours, or until the casserole is hot and ready to serve.
- Stir occasionally to ensure even heating.
Air Fryer Method:
- Preheat your air fryer to 350°F (175°C).
- Place the leftover sausage casserole in an air fryer-safe dish.
- Heat for about 10-15 minutes, checking and stirring halfway through.
- Continue heating until the casserole is warmed through and has a slightly crispy top.
Best Tools for Making This Casserole
Oven: Used to bake the casserole at a consistent temperature of 375°F (190°C).
Large skillet: Essential for browning the sausages and sautéing the onions and garlic.
Casserole dish: Used to transfer the sausage mixture for baking in the oven.
Knife: Necessary for chopping the onions and mincing the garlic.
Cutting board: Provides a safe surface for chopping and mincing ingredients.
Wooden spoon: Ideal for stirring the ingredients in the skillet to combine them well.
Measuring cups: Used to measure the chicken broth and other liquid ingredients accurately.
Measuring spoons: Necessary for measuring the dried thyme, oregano, salt, and pepper.
Can opener: Required to open the can of diced tomatoes.
Tongs: Useful for handling and turning the sausages while browning them in the skillet.
How to Save Time on Making This Casserole
Pre-cook the sausages: Cook the sausages ahead of time and store them in the fridge. This way, you only need to reheat them when assembling the casserole.
Use pre-chopped vegetables: Save time by buying pre-chopped onions and minced garlic from the store.
One-pot method: Use an oven-safe skillet to cook everything, then transfer directly to the oven. This reduces the number of dishes to clean.
Batch cooking: Double the recipe and freeze half for a quick meal later. This way, you only need to cook once but get two meals.

Sausage Casserole Recipe
Ingredients
Main Ingredients
- 6 sausages
- 1 cup chopped onions
- 2 cloves garlic, minced
- 1 can diced tomatoes
- 1 cup chicken broth
- 1 teaspoon dried thyme
- 1 teaspoon dried oregano
- to taste salt and pepper
Instructions
- Preheat your oven to 375°F (190°C).
- In a large skillet, brown the sausages over medium heat until cooked through. Remove and set aside.
- In the same skillet, sauté the onions and garlic until softened.
- Add the diced tomatoes, chicken broth, thyme, oregano, salt, and pepper. Stir to combine.
- Return the sausages to the skillet and mix well.
- Transfer the mixture to a casserole dish and bake in the preheated oven for 30 minutes.
- Serve hot and enjoy!
Nutritional Value
Keywords
Suggested Appetizers and Desserts for This Casserole
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