Banana Oatmeal Pancakes: My Family's Healthy-ish Fave!

Ingredients

• 1 cup (120g) all-purpose flour (plain flour)
• 1/2 cup (45g) rolled oats (not instant)
• 2 tablespoons granulated sugar
• 2 teaspoons baking powder
• 1/4 teaspoon baking soda
• 1/4 teaspoon salt
• 1 ripe banana, mashed (about 1/2 cup)
• 1 cup (240ml) milk (dairy or non-dairy)
• 1 large egg, lightly beaten
• 2 tablespoons unsalted butter, melted (plus extra for greasing the pan)
• 1 teaspoon vanilla extract
• Maple syrup or honey (optional)
• Fresh fruit (berries, banana slices) (optional)
• Chopped nuts (walnuts, pecans) (optional)