The combination of sausages and bell peppers is a classic, and when made in the slow cooker, this recipe is full of flavor and comes together easily. A mixture of onions, peppers, garlic, tomatoes, red wine, and italian seasoning complements the italian sausage, making for the perfect pasta topping or sandwich filling. It's also delicious eaten all on its own. Even if the sausage is fully cooked, it does need to be browned before adding to the slow cooker to remove excess fat and achieve a nice color and texture. Then all you need to do is layer the ingredients in your crockpot, wait a few hours, and then enjoy this delicious italian slow cooker sausage and peppers tonight. Italian sausage comes in two flavors: hot and sweet. They both contain fennel, garlic, and onion, but the hot also have crushed red pepper flakes. Use the variety you like best.