Gather all ingredients.
Preheat oven to 350 degrees. Place apples in a small baking dish. Melt butter in a small bowl. Add cinnamon, brown sugar, salt and lemon juice to the melted butter.
Whisk together until smooth. Pour over apples. Mix until all apples are covered. Bake at 350 degrees for 25-30 minutes, depending on desired doneness.