Oatmeal Peanut Butter Chocolate Chip Banana Bread

2½ cups oatmeal (make sure they are certified gluten free if you have a gluten intolerance)
1 cup mashed ripe bananas (3 bananas if they are small, 2 very large bananas)
½ cup peanut butter
½ cup dark brown sugar
2 tsp baking powder
½ tsp cinnamon
non-dairy milk or water (if necessary)
1½ cup chocolate chips (I used Enjoy Life mini chocolate chips)
banana slices for garnish if desired