Banana Nut Breakfast Bars

Name: Banana Nut Breakfast Bars
Cook time: 1 h
Total time: 1 h
Cuisine: American
Ingredients: 2 ripe medium bananas (about 240 grams peeled); 2 large eggs; 6 tablespoons/90 milliliters olive oil, plus more for greasing the pan; 3/4 cup/187 grams peanut or almond butter; 6 tablespoons/120 grams honey; 2 teaspoons kosher salt (such as Diamond Crystal), or 1 teaspoon fine salt; 2 teaspoons ground cinnamon; 2 teaspoons pure vanilla extract; 1 cup/100 grams old-fashioned rolled oats; 3/4 cup/80 grams walnut halves and pieces, roughly chopped; Flaky salt, for topping