Microwave Breakfast Cake for One

Name: Microwave Breakfast Cake for One
Ingredients: 1 tablespoon milk or non-dairy milk; 1/2 teaspoon chia seeds; 1/2 teaspoon vanilla extract; 1 egg yolk; 1/2 very ripe medium banana, mashed (see Cook's Note); 3 tablespoons white whole wheat flour; 1/4 teaspoon baking powder; 1 tablespoon peanut butter; 1/2 teaspoon ground cinnamon, plus additional for topping; Honey, for drizzling; 1 tablespoon semisweet chocolate chips; 1 tablespoon chopped walnuts, plus additional for topping; Orange zest, for topping; Honey, for topping (optional); 1 tablespoon old-fashioned rolled oats; 1 tablespoon chopped figs; 1/2 teaspoon ground cinnamon; Sliced almonds, for topping; Coconut flakes, for topping; Maple syrup, for drizzling (optional)