Preheat oven to 350°F. Grease a large 9x13 casserole dish.
Cut the corn tortillas into 1-inch strips. Set aside a small portion of the onions and olives (about 25% each) to be used as a topping later.
In a large skillet over medium heat, brown turkey and onions in olive oil with the garlic powder, chili powder and cumin for about 5 minutes or until meat is fully cooked. Turn heat down to medium-low, then add soup, salsa, green chiles and olives. Stir until fully heated, about 2 minutes.
Using half of the tortilla strips, line the bottom of the casserole dish in a single layer. Pour half of the turkey mixture over the top and spread evenly. Sprinkle with a third of the shredded cheeses. Repeat.
Sprinkle the top of the casserole with reserved olives, onions and smoked paprika.
Place in oven and bake for 45 minutes or until the cheese is golden brown on top.
Notes
Alternatively, you could use chicken instead of turkey. I often do.