Combine the sauce, pasta, peas and tuna together and transfer to a 2-quart casserole dish. Sprinkle the Cheddar cheese over the top of the casserole and top with breadcrumbs and Parmesan. Transfer the casserole dish to the oven and bake for 25 to 30 minutes, or until the casserole is warmed through and the breadcrumbs on top have browned.