3 tablespoons olive oil
1/3 cup red wine vinegar
1 large clove garlic, minced
1 teaspoon kosher salt
1/2 teaspoon black pepper, or more to taste
4 cups cooked butter beans (approximately two 15 ounce cans)
1/2 cup thinly sliced scallions (approximately 2 large scallions)
1/4 cup diced roasted red pepper
1/4 cup finely diced fresh red bell pepper
1/4 cup chopped parsley