Preheat oven to 375 degrees F
Place the oats in a large bowl and pour in the boiling water. Stir to combine, and cover the bowl with a plate or lid large enough to trap the moisture. Let rest for 15 minutes.
Meanwhile, spray a 12-cup muffin tray with oil, or use baking cups to line. For mini-muffins, use a 24 cup mini muffin tray and prepare the same way.
After the oats have hydrated, add the applesauce, maple syrup, oil and vanilla and whisk to thoroughly combine. Whisk in the baking powder, baking soda, salt, cinnamon and nutmeg until combined.
Using a flexible spatula, gently fold in the oat flour, scraping the bottom and sides of the bowl as you mix. Add the dried fruit and stir a few more times until evenly distributed.
Spoon the batter into the prepared muffin pan and bake: 18 to 20 minutes for regular-sized muffins; 9-11 minutes for mini muffins. Bake until the muffins are golden brown and a toothpick inserted in the center of one of the muffins comes out clean. Let cool on a wire rack in the pan for 5 minutes, then gently run a butter knife or offset spatula around the muffins to loosen, if needed, and turn them out onto the rack. Serve warm or at room temperature.