1. Bring 1 1/2 cups water to a boil in a small saucepan over medium heat; stir in rice. Reduce heat to low. Cook, stirring constantly, 15 minutes or until water is absorbed and rice is tender.
2. Mash red kidney beans in a large bowl with a fork or pastry blender. Stir in bell pepper, next 5 ingredients, and cooked rice until well blended. Shape mixture into 6 (1/2-inch-thick) patties.
3. Cook 3 patties in 1 1/2 Tbsp. hot oil in a large nonstick skillet over medium heat 5 minutes on each side or until golden. Repeat procedure with remaining oil and patties.
4. Stir together mayonnaise, Creole mustard, green onions, and parsley. Place 1 lettuce leaf on each bread slice; top each with 1 patty and desired amount of mayonnaise mixture.