We love the interest you're taking in our recipe, and we couldn't be happier. The answer to your question, however, is cheese. The cheese in this stuffing will be the ingredient that acts as the glue to hold all the veggies (if you added them) and meat together. This is why, if you pay close attention to the recipe, you'll see that we layered the tortilla with cheese before and after we added the meat. The cheese creates an excellent seal to pack the tortilla and avoid the beef from falling out.