Preheat oven to 450 degrees F.
In large skillet, brown ground beef over medium heat 8 to 10 minutes or until no longer pink, breaking up into 3/4-inch crumbles. Pour off drippings. Season with salt.
Place bread shell on ungreased baking sheet. Spread salsa over shell. Sprinkle with half of cheese. Top with beef chiles, tomatoes, red onion and remaining cheese.
Bake for 11 to 13 minutes or until cheese is melted. Sprinkle with cilantro; cut into 8 wedges.
Makes 4 servings.