High-Fiber, High-Protein Breakfast Bars

INGREDIENTS

• cooking spray
• 1 1/2 cups quick-cooking oats
• 1/4 cup wheat germ
• 1/4 cup ground flax seed
• 2 tablespoons vanilla-flavored hemp protein powder
• 1 teaspoon ground cinnamon
• 1/2 teaspoon salt
• 3 bananas
• 1/4 cup peanut butter (such as Jif®)
• 2 tablespoons honey
• 1 teaspoon vanilla extract
• 1/4 cup natural peanut butter, or to taste