In a bowl, mix butter, lobster meat, cilantro, and lemon peel. Spoon across a piece of plastic wrap and roll up into a 1 1/2-in.-thick log.
Refrigerate at least 1 hour or up to 3 days. With a sharp knife, cut into slices about 1/4 in. thick to top oysters.
Note: Nutritional analysis is per oyster with 2 tsp. topping.