You can use sour cream or yogurt if you do not have mayo. I have my vegan mayo recipe on the blog. You can use any brand taco seasoning. I used Old El Paso's Hot & Spicy taco seasoning. Also, you can use whichever brand tortilla or taco sauce you have on hand. I used Mission flour tortillas and Ortega taco sauce. You can use any long grain rice you have on hand.