Cut potatoes in half lengthwise and then slice into thin 1/4-inch thick half moons.
Using a separate clean cutting board, cut chicken into 1/2-inch strips.
Combine onion soup mix, water and chicken in microwave safe dish. Stir until combined.
Top with single layer of potatoes, leaving center empty for venting. Top with sliced Swiss cheese.
Tightly cover with lid or plastic wrap and place in microwave. Microwave on HIGH for 12 minutes* or until potatoes and chicken are done. Let sit 2 minutes. Use oven mitts to carefully remove from microwave. Garnish with fried onions and serve. CAUTION: Due to steam build-up, use oven mitts or tongs to remove plastic wrap from dish.
* Cooking times may vary depending on your particular microwave.