OP here- my kid likes any burrito from any place (incl Chipotle), as long as it doesn't have much in it besides the ingredients I listed
I don't mind prepping pinto beans from scratch- celery and bay leaf when simmering is a great idea, thanks! I shop at Costco and Safeway the most. I think I will get some pinto beans, maybe even organic if it exists.
I am planning to just boil some organic meat and shred it or cut into small pieces. They also add some kind of tomato sauce in it I think, I will try to go with tomato paste and taco seasoning.
Thank you all, this is very helpful, esp the tip about wet paper towels when heating up a tortilla.