Tuscan Tuna and Beans White or Green Beans Recipe

1/2 medium red or 2 scallions, chopped
2 Tbsp. red wine vinegar
3 cups cooked white beans or 1 pound steamed or boiled green beans
1/4 cup extra virgin olive oil
Fine sea salt
Freshly ground pepper
8-10 ounce canned tuna, packed in olive oil (or fresh tuna, grilled or poached, marinated in extra virgin olive oil)
1 Tbsp. chopped parsley

Marinate the onion with vinegar for 15 minutes, drain.
Put the beans in a serving bowl. Mix with the onion, extra virgin olive oil, salt, and pepper.
Drain the tuna, break it into flakes or chunks with a fork and scatter it on top of the beans. Sprinkle with the parsley.
Serve as antipasto with Italian bread.