Oysters Rockefeller Recipe

Shuck oysters, reserving bottom shell; set aside. In a large skillet, saute onion in butter until tender. Add spinach; cook and stir until wilted. Remove from the heat; stir in the cheese, lemon juice and pepper. Spread kosher salt into two ungreased 15-in. x 10-in. x 1-in. baking pans. Lightly press the oyster shells down into the salt. Place one oyster in each shell; top each with 2-1/2 teaspoons spinach mixture. Bake, uncovered, at 450 ° for 6-8 minutes or until oysters are plump. Serve immediately.