Brush one side of each scallop with avocado oil.
Remove them from their shells and fill each shell with ½ tsp avocado oil. Sprinkle a few shavings of garlic into the shell and season with black pepper.
Heat a grill pan or small frying pan and sear the oiled side of the scallop for one minute. Remove them from the grill and return to their shells, with the uncooked side in the oil.
Place the scallop shells onto the grill and cook for a further 3 minutes.
Serve with lime juice sprinkled over each.
Note: Avocado oil has a very high smoke point and will therefore not deteriorate when used to cook on the BBQ.