Combine the sweet potato, banana, eggs, vanilla and melted butter in one bowl.
To another bowl, combine the flour, baby cereal, apple, baking powder, cinnamon, salt, flax and hemp hearts. Add the wet to the dry then transfer to a few mini muffin tins, filling them almost to the top. Sprinkle with additional hemp hearts then bake for 10-13 minutes until firm on top. Allow to cool fully before serving.
If you don't have sweet potatoes already cooked (it's a meal prep staple in my house), you can throw them into the microwave for about 10 minutes until super tender when pricked with a fork.
If you're going to be making these often, silicone muffin trays are amazing as it makes getting the muffins out so easily.