PLACE potatoes in microwaveable bowl. Add 1/4 cup water; cover with waxed paper. Microwave on HIGH 1-1/2 min.; stir. Microwave an additional 1-1/2 to 2 min. or until potatoes are tender; cool slightly.
DRAIN potatoes. Whisk eggs and remaining water in medium bowl until blended. Add stuffing mix, onions and potatoes; mix well. Shape into 24 patties, using about 2 Tbsp. potato mixture for each. Place on baking sheet. Refrigerate 30 min.
COOK patties, in batches, in large skillet sprayed with cooking spray on medium heat 6 min. or until golden brown on both sides, turning carefully after 3 min.
SERVE with sour cream.