Making meatballs in the pressure cooker is easy, fast and splatter-free. I make them often so I’ve streamlined the whole process to dirty as few dishes as possible. Meatballs in tomato sauce are a classic Southern Italian recipe, but when they’re draped over spaghetti, they’re actually being served in an Italian American way. Play around with the ingredients for different flavors - use seasoned instead of plain breadcrumbs, use another kind of hard cheese (halve the salt if using pecorino) or replace the oregano with hot pepper flakes.