Prepare your BBQ with charcoal. Pre-heat your oven to 350 degrees.
Mince garlic, then saute with oil and butter in pan. Add your spinach.
Let spinach cook down. Turn and sprinkle with the lemon peel.
Remove from stove and allow to cool.
Put the oysters on BBQ. When shells open, remove.
Halve shells. Discard empty shells.
Dress oysters with spinach mixture and place 1 T. Marscapone on top.
Take a cookie sheet and spread a layer of rock salt on it.
Place oyster shells on salted cookie sheet. Place so they don't move around.
Bake at 350 degrees for about 10 minutes, until cheese melts.