Caramelize onions in olive oil
Season ground beef with salt, pepper, garlic powder and onion powder
Brown the seasoned ground beef
Mix sauce ingredients: light mayo, ketchup, mustard, relish and white vinegar
Brush butter on baking sheet
Layer tortillas, beef, cheese and onions on the prepared pan
Brush the layers with animal-style sauce
Fold tortillas over
Cover with another pan
Bake at 450°F for 15-20 minutes
Cut and serve with lettuce, tomatoes, pickles and remaining sauce
