Process: Start by lining your slow-cooker with a liner (like this). Then combine 2 cups of the apples with the milk, water, oats, 1/4 c. brown sugar, butter, vanilla, cinnamon, salt, and nutmeg. Cover and allow to cook on low for at least 6 hours. Before you’re about to serve, heat your oven to 450F and take out a baking pan. In a small bowl, toss the apples in oil and toss to coat thoroughly. Put on the baking pan and roast for about 10 minutes. Stir halfway through. Remove from oven and stir in the teaspoon of brown sugar and lemon juice. Serve oatmeal with apples and walnuts!