2Combine flour, 1/2 cup sugar, ginger, baking powder, salt and chocolate in bowl; stir well. Make a well in center. In another bowl, whisk together milk, butter and egg. Add to flour mixture, don't over-stir. Stir just until moist. Coat 12 muffin cups with cooking spray. Spoon 1 Tbsp batter into each cup. Spoon 2 tsp preserves into center of each cup; top with remaining batter. Sprinkle evenly with 1 Tbsp sugar. Bake for 22 minutes or until muffins spring back when touched lightly in center.