Shell the shrimp, devein, wash, land drain on a paper towel. Melt the butter or margarine in a 13x9x2-inch baking dish. Add the salt, garlic and half of the parsley. Arrange the shrimp in a single layer in a baking dish. Bake uncovered in a 400 degree oven for 5 minutes.
Turn the shrimp and sprinkle with the lemon peel, lemon juice and remaining parsley. Bake 8-10 minutes more, or just until tender. Arrange on a heated platter. Pour the garlic butter over all. Garnish with lemon wedges.