Cut apples in half lengthwise. Using spoon, remove and discard cores, making at least a 1-inch indentation in each apple half. In microwavable pie plate, arrange apple halves, cut sides up. If needed, cut thin slice off bottoms to keep halves from tipping.
Fill each apple half evenly with raisins and brown sugar; dot with butter. Cover with microwavable plastic wrap, folding back one edge 1/4 inch to vent steam.
Microwave on High 5 to 6 minutes or until apples are tender. Top each with granola. Serve with milk.