Flavoring the beans. Toss the warm beans in a big bowl with the onions or scallions, garlic, several tablespoons of oil, herbs, salt, and pepper to taste. Let stand 30 minutes, tossing several times, and correcting the seasoning. Serving. Build an elaborate composition with eggs, sardines, and so forth, or use a simple decoration of spinach leaves, strips of red pepper or pimiento, and onion rings.