YES, YOU CAN FIND AUTHENTIC MEXICAN FOOD IN QUINCY, IL WE'VE PREPARED OUR BEST FAMILY RECIPES JUST FOR YOU Kick back with a margarita, dip your chips in queso or chow down on crunchy tacos at Mi Jalapeno #3 Inc. We're a favorite Mexican restaurant in Quincy, IL. For over a decade, our family-owned and -operated restaurant has been cooking up authentic Mexican food using family recipes. Love our food? Serve it at your conference or party. We offer affordable Mexican food catering services. Call 217-221-8586 now to place your order.