Easy Banana Oat Bars

Name: Easy Banana Oat Bars
Prep time: 5 min
Cook time: 20 min
Total time: 25 min
Cuisine: American
Ingredients: 1 cup ripe bananas (approx 3 medium-large); 1/4 cup melted butter; 1/4 cup peanut butter (can omit to make nut-free); 1/4 cup plain Greek yogurt; 1/4 cup sugar (can sub maple syrup); 1 egg; 1 tsp vanilla; 1 cup flour (use gluten-free if needed); 1/2 cup quick oats**; 1 tsp baking soda; 1 tsp cinnamon; 1/4 cup ground flax; 1/4 cup hemp seeds; chocolate chips, optional