Slow Cooker
Blacken the bell peppers - see Notes for instructions. Then chop and add to the slow cooker pot.
Cut the defrosted sausages into thirds.
Spray a large frying pan with cooking spray and brown the sausages over medium heat for a few minutes.
Transfer the sausages to the slow cooker pot
Add the onions, chili flakes, garlic, passata, dried mixed herbs, chickpeas, balsamic vinegar to the pot. Add salt and pepper to taste, and stir.
Place the lid on top and cook on low for 8 hours, or on high for 4 hours.
One hour before the end of cooking, stir in the sugar snap peas.
Just before serving, stir in some chopped basil, reserving a little for garnish.
Oven
Follow directions 1 - 5 as in the slow cooker method, but use a casserole dish with a lid instead of the slow cooker pot.
Place the lid onto the casserole dish and cook in a preheated oven (200C/400F/Gas 6) for 1 hour.
Add the sugar snap peas about 10 minutes from the end of cooking.
Just before serving, stir in some chopped basil, reserving a little for garnish.
Stove Top
Blacken the bell peppers - see Notes for instructions. Chop and set aside.
Spray a large lidded frying pan, or saucepan with cooking spray and cook the onions and chili flakes over low heat with a splash of water. Cook for about 10 minutes until the onions have softened.
Cook the sausages according to the pack instructions.
Add the garlic, roasted peppers, passata, herbs, chickpeas and 4 tablespoons of water to the softened onions and simmer for 5 minutes. Stir in the balsamic vinegar, and add salt and pepper to taste.
Cut the sausages into thirds and stir into the stew with the sugar snap peas and some of the chopped basil, reserving a little for garnish.
Cook for a further 5 minutes and serve.