i was with you until you said celeryBest way IMO
Chuck roast, spices, onions/garlic/fresh jalapanos, maybe a little celery for texture.
Shredded cheese on top with sour cream ( homemade Greek-style yogurt works too) and green onions.
Cornbread is optional but if you make it, don't put sugar or AP flour in it... that's called 'cake'
now dicing up some tomatoes would be acceptable but celery?