Tuscan Tuna

1/4 cup(s) olive oil

4 ounce(s) (half an 8-ounce long loaf)

Italian bread , cut into 1-inch cubes

2 clove(s)

garlic , crushed with side of chef's knife

1/2 pound(s) green beans , trimmed

1/4 cup(s) red-wine vinegar

2 tablespoon(s) capers , drained and chopped

1 teaspoon(s) sugar

1 teaspoon(s) Dijon mustard

1/2 teaspoon(s) salt

1/4 coarsely ground black pepper

1 can(s) (12 ounces)

solid white tuna in water , drained and broken into large pieces

1 can(s) (16 to 19 ounces)

white kidney beans (cannellini) , rinsed and drained

2 tomatoes , each cut into 8 wedges

1 head(s)

green-leaf lettuce , torn into 2-inch pieces

1/2 head(s)

chicory , torn into 2-inch pieces

1 small red onion , cut in half and thinly sliced