Preheat oven to 425 degrees. Preheat a large skillet over medium high heat.
Add 2 tbsp extra virgin olive oil and ground beef.
Season with chili powder, cumin and red onion.
Brown the meat, 5 minutes.
Add tomatoes and taco sauce.
Add black beans and corn.
Heat the mix through, 2-3 minutes then season with salt.
Coat a shallow baking dish with remaining olive oil, about 1 tbsp.
Cut the tortillas in half or quarters to make them easy to layer with.
Build lasagna in layers of meat, then tortillas, then cheese.
Repeat (ending with cheese on top).
Bake lasagna 13-15 minutes until cheese is bubbly and brown.