Oat and Apple Pancakes with Yogurt

Name: Oat and Apple Pancakes with Yogurt
Ingredients: 1 cup whole wheat flour; 3/4 cup old-fashioned oats; 1/4 cup finely chopped pecans or almonds; 1 teaspoon baking powder; 1 teaspoon baking soda; 1/2 teaspoon ground cinnamon; 1/2 teaspoon kosher salt; 1 large egg; 1 3/4 cups buttermilk; 2 tablespoons pure maple syrup, plus more for serving; 2 tablespoons virgin coconut oil, melted, slightly cooled, plus more for skillet; 1 medium apple (such as Granny Smith or Pink Lady), peeled, cored, sliced crosswise ¼ inch thick; Plain yogurt (for serving)