Heat 1 tablespoon of the oil in a 10-inch skillet over medium heat. Add onion and cook until tender, about 5 minutes, stirring occasionally; remove to a large bowl. Add remaining 1 tablespoon oil to same skillet over medium-high heat; add chicken pieces and cook until well browned on all sides, about 5 minutes, stirring occasionally.
Place chicken in bowl with onion; add beans, tomato, pepperoncini peppers, parsley, vinegar, salt, and TABASCO® Sauce and toss well.
To serve, line a large platter with lettuce leaves; top with chicken salad and garnish with pickled peppers.
Makes 4 servings.
Nutritional information per serving: 346 calories, 11g fat, 72mg cholesterol, 1162mg sodium, 27g carbohydrates, 35g protein