Packed with protein and fiber, this tuna and bean salad is ready in a flash. Serve with warm, crusty bread or pack it in a pita for a sandwich. For an extra kick, add a pinch of crushed red pepper or cayenne.
Combine beans, tuna, bell pepper, onion, parsley, capers, rosemary, 1/4 cup lemon juice, and 2 tablespoons oil in a medium bowl. Season with pepper. Combine the remaining 1/4 cup lemon juice, 2 tablespoons oil, and salt in a large bowl. Add salad greens; toss to coat. Divide the greens among 4 plates. Top each with the tuna salad.