I start with my spaghetti sauce
Otherwise a jar/can of spaghetti sauce will work too, I just add:
garlic and italian seasoning to taste
1 green pepper sliced and sauteed
1 onion sliced and sauteed
Mushrooms sliced and sauteed
Then you'll need:
1lb ground beef, browned and drained (when I prepare my spaghetti sauce to freeze, I don't always include the meat. Obviously your jarred stuff won't have meat either.)
1 box large pasta shells
8oz cheese - cheddar, motz, parmesean, etc. all work
Heat oven to 350*.
Cook pasta according to directions.
Drain pasta and rinse with cool water (so you don't burn your fingers when you stuff the shells!)
Once your ground beef is browned and drained, add your veggies if you are using jarred sauce or your spaghetti sauce if you made it ahead of time.
Take a cooled shell and stuff with approximarely 1/4 cup of sauce/meat mixture.
Place in baking dish.
Repeat for all shells/sauce. If you run out of shells before you run out of sauce, pour the extra over the top.
Cover the top of the shells with the cheese.
Bake at 350* until heated through and cheese is melted.