Combine the oatmeal, water, and salt in a medium saucepan. Bring to a boil.
Add the grated apple and lemon juice and cook for about 5 minutes, stirring occasionally.
Add the milk and butter. Stir well and cook for 1 minute.
Serve immediately, perhaps with a sprinkle of brown sugar or a drizzle of maple syrup.
Per serving: 277.4 calories, 177.2 calories from fat, 19.7g total fat, 6.9g saturated fat, 73.3mg cholesterol, 1597.6mg sodium, 9.6g total carbs, 5.5g sugars, 15.5g protein