1In 10- or 9-inch glass pie plate, arrange chicken, thickest parts to outside edges (sides of chicken will touch). Cover plate with microwavable plastic wrap, folding back one corner or edge 1/4 inch to vent steam. Microwave on Medium (50%) 14 to 16 minutes or or until juice of chicken is clear when center of thickest part is cut (170°F). Let stand 5 minutes. Cool slightly; cut into desired size of pieces.
2Meanwhile, heat oven to 350°F. Spray 3-quart casserole with cooking spray. Separate cans from chow mein mix. Drain large can of vegetables. In bottom of casserole, place 1 1/2 cups of the chow mein noodles. In large bowl, stir together both cans of chow mein mix, the pea pods, soup, water chestnuts, soy sauce and 3/4 cup of the cashews.
3Stir chicken into chow mein mixture. Spoon over chow mein noodles in casserole.
4Cover with foil; bake about 1 hour or until hot. In small bowl, mix remaining 1 1/2 cups noodles and 1/4 cup cashews; sprinkle over casserole. Bake uncovered 5 minutes longer.