Preheat the oven to 350°. Spray a standard 12-cup muffin tin with cooking spray. In a large bowl, whisk the flour with the sugar, baking powder and salt. In a large measuring cup, whisk the milk with the oil, eggs and vanilla. Fold the egg mixture into the dry ingredients just until incorporated; do not overmix. Gently fold in the raspberries, dried peaches and candied ginger.
Spoon the batter into the prepared muffin cups and bake for 25 minutes, or until a toothpick inserted in the center of a muffin comes out clean. Let the muffins cool in the pan for 5 minutes then transfer them to a rack to cool for at least 15 minutes. Serve warm or at room temperature.
The muffins can be stored overnight in an airtight container.