Vegan Sweet Potato Date Muffins

Name: Vegan Sweet Potato Date Muffins
Ingredients: 1 cup / 150g whole-grain wheat flour; 2 teaspoons baking powder; ½ teaspoon baking soda; 2 teaspoons ground cinnamon; 1 teaspoon ground ginger; ¼ teaspoon fine sea salt; 1 cup / 100g rolled oats; 1 cup / 150g chopped dates; ¼ cup / 60ml coconut oil, melted, plus more for greasing the muffin tin; 2 ripe bananas; 1 cup / 275g sweet potato purée (from about 1 large roasted sweet potato); ¹⁄8 cup / 80ml pure maple syrup; 2 teaspoons pure vanilla extract; ¾ cup / 185ml plant-based milk of your choice; Handful of chopped raw, unsalted pecans; Zest of 1 orange