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["Preheat oven to 375u00b0.", "Squeeze juice from lemon halves into a large bowl with 2 cups cold water.", "Peel top third of each apple.", "With a small knife and working from the top of each apple, carefully carve out a large""bowl,"" including the core, about 2 inches in diameter, leaving the bottom of apple intact.", "Reserve all cut-away pieces.", "Place carved apples in lemon water.", "Chop cut-away apple pieces into small chunks, removing any core or seeds.", "Toss with 3 tablespoons honey and cinnamon; set aside.", "Combine remaining 9 tablespoons honey with 1/2 cup hot water and stir until well blended.", "Stand apples, cut side up, in a 9"" x 9"" shallow baking dish.", "Place 1 teaspoon butter in bowl of each apple and pour honey and water mixture on top.", "Cover dish with foil and bake until tender, 25 to 35 minutes.", "Meanwhile, in a medium saucepan, bring 1 3/4 cups water and a pinch of salt to a boil.", "Add oatmeal and apple pieces, and stir until mixture returns to a boil; reduce heat and cover.", "Cook until tender, 7 to 10 minutes.", "Remove from heat.", "Remove apples from oven and carefully fill with oatmeal mixture.", "Top with brown sugar.", "Place under the broiler 1 minute, just until light brown sugar is bubbly and dark brown.", "Serve with whipped cream, if desired."]