01 -
Slice green and red bell peppers along with the onion into thin strips and place them in the slow cooker.
02 -
Sprinkle garlic powder, Italian seasoning, salt, and black pepper over the sliced vegetables. Pour marinara sauce and tomato paste on top, then stir gently to combine.
03 -
Cover and cook on low heat in the slow cooker for 2 hours, stirring occasionally to ensure even cooking.
04 -
In a skillet, melt butter over medium heat. Add sausage links and sear until browned on all sides, about 5-7 minutes. This step is optional but enhances flavor.
05 -
Add the browned sausages to the slow cooker with the vegetables. Cover and cook on low for an additional 4 hours, stirring every hour carefully to avoid breaking the sausages.
06 -
Remove sausages if desired and slice them. Return to the slow cooker, stir gently, and serve hot either on their own, over pasta, or on sandwich buns as preferred.