Heat oven to 375. Grease two 5 1/2-inch diameter (length across) oven-safe bowls with coconut oil.
In a medium sized bowl mix the mashed banana, milk, peanut butter, maple syrup, vanilla and flaxseed meal until thoroughly combined. Let the mixture sit for 5 minutes.
Stir in the oats, cinnamon, baking powder and salt until well combined. Fold in the chocolate chunks.
Divide the mixture between the two greased bowls then bake for 30 minutes or until the center no longer looks wet. Don't overbake.
After removing from the oven, let the oatmeal rest for 5 minutes.
Top with banana slices, peanut butter, melted chocolate and peanuts.