Spray casserole dish with Pam. Layer 1/2 of each of the above listed ingredients in order listed, then repeat. Bake in 350 degrees oven or in microwave on High until vegetables are tender. (Approximately 1/2 hour in oven or 15 to 20 minutes in microwave). Once cooked, if desired, broil for a couple of minutes to lightly brown top. Serves 4.