01 -
Heat olive oil in a skillet over medium-high heat. Brown the sausages on all sides for about 2 minutes per side. They should not be cooked through.
02 -
In the slow cooker, combine sliced peppers, onions, minced garlic, Italian seasoning, salt, and pepper. Toss everything to coat evenly.
03 -
Pour the marinara sauce evenly over the vegetable mixture. Place the browned sausage links on top.
04 -
Cover and cook on Low for 4-5 hours or on High for 2-3 hours, until sausages are fully cooked and vegetables are tender.