Broccoli and cauliflower in sour cream sauce

7 steps

500g broccoli	Cut into florets. Boil or steam until just tender, drain.			Place into heatproof serving dish, pour sauce over. If necessary to reheat, cover, bake in moderate oven 20 minutes.
1 small cauliflower	Cut into florets. Boil or steam until just tender, drain.
sauce
90g butter		Make white sauce	Stir in
2 onions	finely chop
2 tablespoons flour
2 tablespoons brown sugar
1 teaspoon dry mustard
1 1/2 cups milk
1 cup sour cream
2 tablespoons parsley	chop