Ingredients: 1 small red onion, quartered 1/3 cup balsamic vinegar 2 tablespoons chopped fresh oregano 2 teaspoons minced garlic 1 1/2 pounds flank steak 1/4 teaspoon salt 1/4 teaspoon black pepper Directions: 1. Slice one-quart of the onion and dice the rest of the onion. Mix onion with vinegar, oregano, and garlic. Combine 1/4 of mixture with the sliced onion and set aside....
