For a good supply of lunchbox treats, make a double batch of these apple-walnut bars and freeze individual bars wrapped in foil.
Make Ahead Tip: Store in an airtight container for up to 1 week. Freeze for longer storage.
Tip: To toast chopped walnuts: Place in a small dry skillet and cook over medium-low heat, stirring constantly, until fragrant and lightly browned, 2 to 4 minutes.
Storage smarts: For long-term freezer storage, wrap your food in a layer of plastic wrap followed by a layer of foil. The plastic will help prevent freezer burn while the foil will help keep off-odors from seeping into the food.
1 starch, 1/2 other carbohydrate, 1/2 fat