Italian sausage, no casings
monterey jack cheese, shredded
parmesan cheese, grated
Slice squash into 1/2-inch-thick pieces; sprinkle with salt and pepper.
Saute squash in butter in a skillet over medium heat; drain and set aside.
Add sausage to skillet; cook until browned, stirring until crumbly, then drain of excess fat.
Add spaghetti sauce to meat; simmer until thickened, about 10 minutes.
Layer half the vegetables, meat sauce, jack cheese and cottage cheese in a 12x7-inck baking dish; repeat layering, then top with parmesan cheese and bread crumbs mixed with melted butter.
Bake in preheated 350 oven 30 to 35 minutes, or until bubbly.