Here’s what you’ll need-    2 cans cannellini beans    1/3 cup olive oil or one of your choice    3 tablespoons red wine vinegar    1 teaspoon salt    Pepper to taste    1 medium red onion, peeled and chopped   12 ounce can tuna, drained In a bowl, mix together oil, vinegar, salt and pepper. In another bowl add the beans and onion then add the oil/vinegar mixture. Cover and refrigerate for at least 1 hour. Transfer the bean mixture to a serving platter and add the tuna on top of the beans.