A small sauce pan should be warmed up slowly. Add the butter and olive oil after they are heated. Add the garlic and cook for 30 seconds or until fragrant. Add the parsley, salt, pepper, lemon juice, and chilli flakes. Cut the heat off.
grill the oysters:
Hold an oyster with an oven mitt and use a shucking knife (or a clean screwdriver if you don't have one) to pry open the oyster. It should easily open.
Spoon sauce into each oyster and return oysters to the grill. Cover and grill 4-5 minutes.