Cut the desired number of zucchini's in half longways. Spoon out the seeds. Fill with spaghetti sauce (preferably homemade). and top with Colby jack cheese. You can also add grilled peppers and/or onions.
Bake covered in a 9x13" pan at 350 degrees for 20-30 minutes (remove foil for last 10 minutes of baking time), or until tender.