Before serving, stir relish. Spoon about 1 tablespoon relish in each bottom shell. Arrange on a platter.
In a large skillet, cook oysters and garlic in hot butter for 2 to 3 minutes or until edges of oysters curl and the surface of the oysters begins to brown. Place a cooked oyster atop relish in each shell. Serve immediately. Makes 8 servings (2 oysters each).