Slow cooker Italian sausage with sauce

https://www.allrecipes.com/recipe/70702/slow-cooker-sausage-with-sauce/?clickId=right%20rail0&internalSource=rr_feed_recipe_sb&referringId=73124%20referringContentType%3Drecipe

Ingredients
2 lbs fresh Italian sausage links
26 ounce jar spaghetti sauce
1 green bell pepper, seeded and sliced into strips
1 onion, sliced
(Or substitute frozen stir fry mix for the veggies)

Directions
Boil the sausages for 5-10 minutes to release excess grease
Place the Italian sausage links, spaghetti sauce, green pepper and onion into a slow cooker. Stir to coat everything in sauce.
Cover, and cook on Low for 6 hours. Serve on hoagie rolls or pasta with mozzarella or provolone