Sauteed Green Beans with Garlic
Ingredients:
-
2 tablespoons olive oil
-
1 small red onion, chopped
-
2 cloves garlic, chopped
-
1 tablespoon red wine vinegar
-
1 pound fresh green beans, trimmed
-
1 tablespoon butter
-
1 teaspoon red pepper flakes
-
salt and ground black pepper to taste