Preheat oven to 400°; boil a large pot of salted water, add ½ the package of pasta + cook 12 min or until al dente, then drain + return to pot

Meanwhile, heat 1 tsp oil in skillet over med; thinly slice onion + sauté 3-5 min until softened; season with salt then add container of sauce + 4 slices cheese; warm 2-3 min until smooth

Lightly oil a baking dish then add pasta, sauce, raw shrimp + salt/pep; stir to combine then layer top with 2 slices of cheese + ½ cup breadcrumbs

Cover baking dish with foil; bake 10-15 min until bubbling; remove foil + bake 10 min more until cheese is melted—yum!