In a deep, 1 1/2 quart, heat-resistant, non-metallic casserole, melt 2 tablespoons butter or margarine on high 30 seconds.
Add celery, onion and green pepper to melted butter.
Cook, uncovered, on high 3 minutes or until vegetables are tender Combine remaining ingredients except 1/3 cup chow mein noodles with vegetables.
Top with 1/3 cup of chow mein noodles.
Heat on medium for 12 minutes or until sauce bubbles.