I found this online at Keyingredient by charlotteh371 when searching for make ahead freezer meals. I haven't ever actually frozen them, but love that I can.
Ingredients
16 oz. mini sweet peppers
1 pound ground Italian (you can use sweet or hot or even sweet turkey)
24 oz. jar spaghetti sauce
8 oz. shredded mozzarella (you can leave this off or use Dairy Free Cheese for DF option)
Directions
Cut tops off peppers and remove seeds. (It's okay if you don't get every single seed out)
Stuff the peppers with uncooked sausage (if using sausage inside of casing, I just squeeze it out of the casing and stuff with the meat) and place in a 9" x 13" casserole dish.
Cover stuffed peppers with spaghetti sauce
Top with shredded cheese (if using)
Bake for 40 minutes at 350 degrees F or until cheese is brown and sausage is cooked through.
Sometimes we serve this over pasta like angel hair or veggie noodles of choice as well.
To Freeze
Complete the first four steps (through topping with cheese) then cover the dish with layers of plastic wrap and foil and freeze for up to 3 months. When ready to eat, thaw overnight in the refrigerator and then bake for 40 minutes at 350 degrees or skip thawing and bake frozen for 60 - 90 minutes.