Cook ground beef in a medium sized skillet. Drain off grease.
Add taco seasoning to ground beef and follow instructions on the package to cook the seasoning into the meat.
Add cumin powder, cream cheese, pepper-jack cheese, and 1/2 cups of enchilada sauce. Stir occasionally. Cook until cream cheese is melted.
Preheat the oven to 350°F. Spray the 9 x 13 pan with a nonstick spray. Spoon red enchilada sauce into the 9 x 13 pan so that there is a thin layer covering the bottom.
Place a tortilla shell on a plate. Use a spoon to scoop the meat mixture onto the tortilla shell.
Roll up the tortilla shell and place it crease down into the pan. Continue to do this until all filled tortillas are in the pan.
If there is leftover meat mixture, spread it over the tortillas.
Pour the red enchilada sauce over the tortillas so that they are evenly covered.
Sprinkle the entire package of taco blend cheese evenly over the tortillas.
Bake for 20 minutes or until cheese is melted. Serve with lettuce and sour cream if desired.