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Slow Cooker Sausage Casserole served with mash and peas in a large white bowl
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5 from 61 votes

Slow Cooker Sausage Casserole with Onion and Mushrooms

The best slow cooker sausage casserole recipe. A delicious and easy to prepare slow cooker recipe idea. Sausages, onions, bacon, mushrooms and beef stock give this dish a rich flavour.
While the garlic and dried herbs add subtle notes of spice. With all these ingredients combined and cooked slowly for 6 hours, your family will love the aroma in the house and the flavours it brings to the plate!
Perfect served with mashed potatoes and peas.
Prep Time10 minutes
Active Time6 hours
Thicken Gravy15 minutes
Total Time6 hours 25 minutes
Course: Dinner, Main Course
Cuisine: British, French
Keyword: crockpot, easy sausage casserole, mushroom and onion gravy, sausage casserole, slow cooker, slow cooker recipe
Yield: 4 People
Calories: 444kcal
Author: Luke and Kay - Flawless Food

Equipment

Ingredients

  • 1 tablespoon Olive Oil
  • 2 Red Onions cut into rings
  • 1 teaspoon Balsamic Vinegar
  • 6 Sausages
  • 100 grams Bacon Lardons
  • 190 grams Mushrooms We like chestnut mushrooms
  • 1 teaspoon Garlic Puree or 2 cloves minced
  • ½ tablespoon Sundried Tomato Puree or 1 tablespoon regular tomato puree
  • 500 ml Beef Stock I reccomend using reduced salt cubes
  • ½ teaspoon Mixed Herbs
  • 2 Bay Leaves
  • 1 tablespoon Cornflour

Instructions

  • In a pan, gently sautee red onion rings in olive oil over low heat with the lid on for about 6 minutes or until soft, stirring occasionally.
    1 tablespoon Olive Oil, 2 Red Onions
    Sliced red onion rings frying in a cast iron pan
  • Add a splash of balsamic vinegar to the onions once softened and stir through with the lid off.
    1 teaspoon Balsamic Vinegar
    Pouring balsamic vinegar over sliced red onion ring cooking in a cast iron pan
  • Meanwhile in another pan and fry off bacon lardons for 2 minutes.
    100 grams Bacon Lardons
    Cooking bacon lardons in a cast iron pan and stirring them with tongs
  • Place sausages in a medium hot pan, use a fork to pierce skin to allow fat to escape during cooking.
    6 Sausages
    Six pork sausages in a cast iron pan being pricked with a silver fork
  • Keep turning sausages until browned on all sides. They do not need to be cooked through, they will finish cooking in the slow cooker.
    Browning off six sausages in a cast iron pan and turning them over with black and silver tongs
  • Into the slow cooker add mushrooms with cooked onions and bacon lardons.
    190 grams Mushrooms
    Sliced chestnut mushrooms, cooked sliced red onions, and bacon lardons in a slow cooker pot
  • Add sundried tomato puree, garlic, herbs and bay leaves.
    1 teaspoon Garlic Puree, ½ tablespoon Sundried Tomato Puree, ½ teaspoon Mixed Herbs, 2 Bay Leaves
    Sliced chestnut mushrooms, cooked sliced red onions, bacon lardons, sundried tomato puree, garlic puree, mixed herbs and two bay leaves in a slow cooker pot
  • Mix together cornflour with equal amount of water until smooth and lump free.
    1 tablespoon Cornflour
    Water pouring into a white bowl with cornflour
  • Pour cornflour mixture in with the beef stock and stir well.
    500 ml Beef Stock
    Pouring cornflour mixture into beef stock in a plastic measuring jug
  • Pour stock over the top of all the ingredients and stir through.
    Pouring beef stock into the sausage casserole in a slow cooker pot
  • Pop the browned sausages on top.
    Six pork sausages on top of the casserole mixture in a slow cooker pot
  • Pop the lid on. Cook for
    6 hours on Low (Recommended for best results)
    or
    4 hours on High
    Turning the slow cooker dial to low heat by hand
  • Keep the lid on the whole time. Do not feel tempted to lift it to look inside or stir it! This will affect the total cooking time.
    Placing the glass lid on top of the slow cooker pot by hand
  • After the full cooking time take the lid off and give a good stir.
    Cooked Slow Cooker Sausage Casserole
  • If you like a thicker gravy mix 1 tablespoon of cornflour with 1 tablespoon of water and add to the pot. Turn on high and keep the lid off. It should thicken within 15 minutes.
    Pouring cornflour mixture into the slow cooker sausage casserole to thicken gravy
  • Ready to serve, perfect with mashed potato and peas.
    Slow Cooker Sausage Casserole served with mash and peas in a large white bowl

Video

Nutrition

Calories: 444kcal | Carbohydrates: 11g | Protein: 33g | Fat: 34g | Saturated Fat: 11g | Polyunsaturated Fat: 2g | Monounsaturated Fat: 7g | Trans Fat: 0.03g | Cholesterol: 17mg | Sodium: 422mg | Potassium: 531mg | Fiber: 2g | Sugar: 5g | Vitamin A: 25IU | Vitamin C: 6mg | Calcium: 29mg | Iron: 1mg