Broccoli and squash topped with a cheese potato crust.
Steam, blanch or microwave the squash and broccoli until just tender. While still warm, mix with the onion and cream cheese. Season with salt and pepper.
Put into a shallow ovenproof dish and cover with mashed potato. Sprinkle with parmesan cheese and brown under a hot grill or in a hot 375ºF oven.
To add additional flavor, try mixing in garlic or other herbs, to taste.