Chunky Monkey Overnight Oats

1 cup rolled oats
1 cup milk
1 teaspoon vanilla extract
2 tablespoons honey
2 teaspoons chia seeds
1/2 cup walnuts, chopped
1/2 cup dark chocolate, chopped (or chocolate chips)
1 banana, diced

Add the oats, milk, vanilla, honey, and chia seeds to a bowl and mix really well. Refrigerate overnight or at least 4 hours.
When ready to eat, stir in the chopped walnuts, dark chocolate, and banana. Top with additional banana slices, walnuts, and chocolate if desired. The overnight oats can be refrigerated up to 3 days.