Next time.... Order one burrito bowl. Ask for as much of the fixings (rice, beans, veggies) as you want
load it up. They won't give you extra meat without the extra cost, but the other extra stuff is free and they tend to give you more meat anyway. Then, ask for 6 flour tortillas on the side (no charge). That will be plenty of food for the two of you for the price of one.
Works great.