{One Bowl} Mini Strawberry Banana Muffins + Doughnuts

Ingredients

• 1 small overripe (black-skinned) banana
• 1/4 cup packed light brown sugar
• 1/4 cup 0% plain Greek yogurt
• 2 Tbsp vegetable oil
• 1/2 tsp pure vanilla extract
• 1 large egg, preferably organic
• 1 cup whole wheat pastry flour
• 1/2 tsp baking powder
• 1/4 tsp baking soda
• pinch of salt
• 5 medium strawberries, preferably organic, hulled and finely chopped