In a large skillet cook ground beef over medium-high heat, until beef is browned and fully cooked. Drain and put back into skillet on stove, reducing heat to medium.
Add taco seasoning, water, corn, rice and 1 cup shredded cheddar cheese. Cook until the cheese is completely melted in the mixture.
In an 11×8 casserole dish, spoon 2 tablespoons of beef mixture on the bottom of the dish, spreading around to lightly cover.
Grab the tortillas and add about 3 tablespoons of beef mixture into each one, and then sprinkle a little cheddar cheese on top. Fold the tortilla up and place in baking dish. Continue until all of the tortillas are gone.
If any ground beef/rice mixture is left, add it on top of the tortillas. Pour jar of salsa on top, all over the tortillas. Finally, add any additional shredded cheese you have left on top.
Bake for 10 minutes, or until cheese is melted and tacos are crispy. Remove from oven and serve.