New York Times

Slow Cooker Ribollita With Smoked Mozzarella Toasts

This classic Italian vegetable soup is a wonderful way to use up stale bread and leftover vegetables — and can be prepared in a pot, in a pressure cooker, or in a slow cooker. With the exception of sliced sandwich bread (which is too flimsy), any crusty bread will work here: sourdough, ciabatta, multigrain and so on. (Since you’re toasting it, it’s not necessary for the bread to be stale, but it certainly can be.) The olive-oil-rich sautéed vegetables melt into the soup as it simmers, but you can throw in other leftover cooked vegetables at the end, with the greens.