In a greased 2-quart baking dish, combine potatoes and seasoning packet, water, milk and sour cream.
Stir in tuna and peas. Bake in a preheated 400°F oven 30 minutes, stirring halfway through.
Top with potato chips and continue baking 3-5 minutes or until lightly browned.
Copyright © 2011 Supervalu, Inc. All Rights Reserved.