Step 1: Crush garlic, peppercorns, cumin seeds, and salt in a mortar with oil and lemon juice.
Step 2: Coat beef with spice paste, add beer or orange juice, and marinate covered for 2+ hours.
Step 3: Heat charcoal until ashed or gas grill for 10-15 mins on high.
Step 4: Cook marinated meat 3-5 mins per side to desired doneness.
Step 5: Add carne asada, beans, pico de gallo, guacamole, and grilled onions. Serve with tortillas, salsa, lime, radishes.