Use ANY combination of these ingredients to make a puree: Sweet potato, baby spinach, zucchini, banana, apples. Put fruit & vegetables in a pan or microwave safe bowl and add enough water to cover. Cook until soft (4-5 minutes). Puree, along with the cooking water. Use 1 cup for these muffins and freeze the rest for another batch OR make smoothies in the morning–just add another banana plus some coconut water and a handful of frozen fruit. Yum!