Preheat your oven to 400°F. This ensures that your packets cook evenly and the chicken reaches the perfect tenderness.
Lay out six sheets of heavy-duty foil on a countertop. If you're using regular foil, consider layering two sheets for added strength.
In the center of each foil sheet, place a third of a cup of ready rice. This will absorb all the delicious flavors from the chicken and sauce.
Cut the chicken breasts into six equal-sized pieces, about half an inch thick. This helps them cook evenly and quickly.
Place one piece of chicken on top of the rice on each foil sheet. Make sure they're spaced evenly for balanced cooking.
In a small bowl, stir together the condensed cream of mushroom soup and water. This will create a flavorful sauce that seeps into everything.
Evenly divide the sliced mushrooms and frozen peas over the top of each piece of chicken. The vegetables give a nice texture and taste.
Top each packet with about two to three tablespoons of the soup mixture, ensuring everything is well-covered.
Carefully bring up the foil sides and double-fold the top and both ends to seal each packet. Leave some space for steam to circulate—this is key for tender chicken.
Place the packets in a single layer on a large cookie sheet. This helps them cook evenly. Bake for 30 to 35 minutes, or until the chicken is fully cooked through (it should reach an internal temperature of 170°F).
Once done, remove the packets from the oven and let them stand for five minutes. This resting time allows the flavors to settle.
Serve one packet per person. Carefully cut open each packet to release the steam before enjoying!