Slow Cooker Sausage Casserole with Onions and Peppers

With autumn here, our slow cooker is getting a few more outings that normal. I love being able to throw things in at the beginning of the day and then let it do the hard work for me. This sausage casserole is one of our favourites. With just a few ingredients and using sausages from our local butchers, it’s simple to put in to cook all day and gives us all a real warming family meal at the end of the day. So here we go our family favourite Slow Cooker Sausage with Onions and Peppers Casserole.

Slow Cooker Sausage Casserole

We’re trying to have a real mix of different meals during the week this year. As our local butchers is a specialist in sausages and they have so many different varieties we are picking them up once or twice a month and making some delicious dishes.

slow cooker sausage casserole with a chill sauce on a white plate

One of the flavours that we’ve tried from them in the past is the Italian Sausage which we used to make an Italian Sausage Casserole. The kids liked it and asked if we could experiment with some other sausage casseroles for dinner.

This, however, can be made milder with some traditional pork sausages or like we have opted for something with a little kick using spicy sausages.

If you go with traditional pork sausage in the casserole then I would recommend adding in 1/2tsp of mild chilli powder to give a little flavour to the sauce as well and making it absolutely delicious.

top down close up of the sausage casserole on a white plate

Top Tip for Making the Sausage Casserole

Although as the sausages cook for so long they are thoroughly done if you don’t want the skin to split it’s worth giving them a little browning before placing in the crockpot.

homemade slow cook casserole with sausages

I grill them for around 3 minutes on each side to brown the sausages slightly making them less likely to disintegrate in the slow cooker as it cooks all day.

It’s not required though and depending on where you get your sausages from you may find that it’s not even needed.

Do you have left over Sausage?

Why not try our delicious quick and easy sausage and bean pasta perfect for mid-week meals.

pasta with sliced sausages kidney beans in a creamy cheese sausage on a white plate with a coloured tea towel behind on a wooden table top

Want the recipe for this crockpot sausage recipe?

Here you go how about trying this fantastic slow cooker recipe for sausage casserole that the whole family will enjoy! Don’t forget to check out the tips above!

Yield: 5 people

Slow Cooker Spicy Sausage Casserole with Onions and Peppers

sausage casserole on a white plate cooked at home in the slow cooker

An absolutely delicious recipe for a slow cooker sausage casserole with onions and green peppers. Use a spicy sausage for full flavour or add a little chili powder to a traditional pork sauce in the sauce.

Prep Time 10 minutes
Cook Time 8 hours
Total Time 8 hours 10 minutes


  • 1 jar passata
  • 2 cloves garlic crushed
  • 1 tsp dried parsley
  • 1 tsp dried oregano
  • 1 tsp salt
  • ½ tsp freshly ground black pepper
  • ¼ tsp crushed red flakes
  • 1 kg spicy sausage
  • 2 green sweet peppers sliced
  • 1 large onion sliced


  1. making sauce for sausage casseroleCombine the tomato sauce, garlic, parsley, oregano, salt, pepper, and red pepper flakes in a large bowl. Set aside.
  2. Place the sausage in the bowl of the slow cooker.sausages in the slow cooker
  3. Top with bell peppers and onions.onions and peppers added
  4. Pour sauce over the top of the sausage and vegetables, making sure the sausages are completely covered.sauce added to the top to make a casserole with sausages in the slow cooker
  5. Place the lid on the slow cooker and cook on low for 7 to 8 hours or high for 3 to 4 hours.slow cooker sausage casserole on a plate

Nutrition Information:



Serving Size:


Amount Per Serving: Calories: 716Total Fat: 55gSaturated Fat: 20gTrans Fat: 0gUnsaturated Fat: 41gCholesterol: 114mgSodium: 1954mgCarbohydrates: 15gFiber: 1gSugar: 7gProtein: 39g

Did you make this recipe and loved it?

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More Ideas for Fall Comfort Food

a bowl of homemade tomato soup with vegetables beside
heaty home cooked beef goulash for chilly days when comfort food is needed for family dinners
delicious quick and simple to make this family friendly cottage pie is great for kids of all ages
pinnable image for a slow cooker sausage casserole

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