Gigantes plaki is a much-loved Greek dish that bakes cooked dried gigantes beans (extra-large white beans) in a savory tomato sauce. For ultimate ease and speed, our version uses canned butter beans and briefly simmers them on the stovetop in a simple yet flavorful sauce made with canned crushed tomatoes and tomato paste for added depth. Fresh herbs and feta cheese add brightness and brininess to round out the dish. If you like, offer the feta on the side at the table; added to individual portions, the cheese has a firmer texture and a sharper bite. To round out the meal, serve with a simple leafy salad and crusty bread for mopping up the sauce.