Taco Bell may use a mix of soy and ground beef or all veggie,not sure.A mix of soy and beef would be cheaper for them.My local H.E.B. grocery store carries something called Skillet Mix,which is a seasoned mix of beef and soy,probably mainly soy.It sells for $1.38 for a one pound roll.I have used it before and it's not bad.
Skillet Mix is a brand name.I know it is not made by nor carries the H.E.B. label.
You could go buy some ground beef,taco seasoning mix like McCormick's or Lawry's or Old El Paso,and some already made taco shells and make your own.
We used to do that when I was a kid.Cook up the meat,drain the fat and add the seasonings and then
make up enough tacos for the family.We also sometimes did chalupa night as well.
I miss that .
I like the chili rellenos you get at Pancho's Mexican Buffet.They are puffy and tasting of egg,and the cheese inside the pepper is nicely melted.They are not greasy either.To make the puffy coating of egg takes a little bit of time since you have to beat the egg whites till fluffy,and then fold in the beaten mix of egg yolks,and flour and baking powder,then dip the peppers in it,etc.
Some places just dip the pepper in egg then flour and then fry them.I prefer the Pancho's type,which is the real Mexican way to make chilis rellenos.
Not sure how many mexican places are in Miami.I would think there would be more cuban places around than mexican,though things may have changed over the years.