This one's good too and really easy!
Mom's Brussels Sprouts.
2 bags frozen Brussels Sprouts
8 oz button mushrooms, quartered
1 medium onion cut in big chunks
2 - 3 T good Italian salad dressing.
1 basket cherry tomatoes
Mix all together in a casserole and microwave till heated through, stirring a time or two.
Fro being so simple and quick it's surprisingly good. I used Trader Joe's Tuscan Dressing.