La Frontera Lunch & Dinner Main Menu Lunch and Dinner Menu Encebollado Steak 10 oz.. Top sirloin smothered in chile and onion sauce, fries, beans and 2 homemade flour tortillas Price – $11.50 Mexican Steak 10 oz.. Top sirloin smothered in host sauce, potatoes, rice, guacamole and 2 homemade flour tortillas Price – $11.50 American