place ground beef in a large saute pan and cook, over medium heat for 10 minute dump into a colander and let fat drain off, and then put it back into the saute pan and add the chili powder and tomatoes and stir until combined.
preheat oven to 350. spoon 1/3 of beef mix into 9X13 in pan and spread around the bottom. use four tortillas breaking them up where necessary to cover meat. then repeat with meat spread and then pour 1/2 cup salsa over that. then sprinkle 1 1/2 cups of the cheese over top/ form another layer of tortillas and then top with meat salsa and cheese. form last layer of tortillas and top with remaining cup of salsa and the rest of the cheese.
bake off for 30 minutes, remove from oven and let it rest for 10 minutes before serving it.