Preheat oven to 450°. Lightly brush tortillas with oil on both sides and place on a baking sheet. Bake for 5 to 10 minutes or until tortillas are crisp on the edges and starting to brown.  Remove from oven and set aside. Spray a large skillet with nonstick cooking spray over medium heat. Drop 4 egg whites into skillet, then, break whole eggs over whites to make 4 separate servings. Cook for 2-3 minutes per side until eggs are cooked. Place one egg on each tortilla shell and top each with 1 tablespoon cheese. Place under the broiler for about 2 minutes until cheese is melted. Spoon 1/2 cup fresh salsa around the edge of each shell.