Make-Ahead Sweet Green Smoothie

1/4 cup old-fashioned oats
1 1/2 teaspoons chia seeds (I've since increased the amount to a scant tablespoon.)
1 cup almond milk (or milk of your choice)
1/4 cup low-fat yogurt (I use vanilla 2% Greek yogurt)
1 medium or large apple, cored and chopped (I use either organic Fuji or Gala.)
6 medium kale leaves, chopped (about a cup, loosely packed, or more to taste; could substitute spinach)
1/2 a ripe avocado, scooped out of the shell
2 tablespoons natural peanut butter
1/2 teaspoon cinnamon
1/2 teaspoon lime juice

Add the oats and chia seeds to the blender, and blend on high until you have the texture of a fine flour. Add the milk, yogurt, and all remaining ingredients. Blend on high until the mixture is smooth, scraping down the sides and blending again, as necessary. It is helpful to stir down to the bottom to make sure the oat mixture is fully incorporated.
Transfer the smoothie to a jar or other lidded container. Refrigerate overnight and shake before drinking. Will keep 2-3 days in the refrigerator.
If you want to freeze, first allow the mixture to soak for at least four hours in the refrigerator.