Step 1Mash avocados with a fork until there are no lumps. Stir in onion, pepper, garlic salt, lime juice and mayonnaise. Add salt and pepper to taste. Cover and refrigerate until serving.
Step 1Shred roast into thin strips with a fork or with your fingers. Fill tortillas with 1 to 2 tablespoons beef and roll up tightly. Insert toothpick into middle of each taquito to secure. You can also skewer 3 to 4 taquitos together.
Step 2Add 1/2 inch oil to medium saucepan and heat over high heat 3 minutes. Fry taquitos until golden brown, 3 to 5 minutes each side, in batches if necessary, and transfer to paper towel-lined tray.