-
Trim
the asparagus
stalks and tie the spears in a bundle. Stand the
bundle in a pan of boiling, lightly salted water.
-
Cover with a lid or foil and cook for 10 minutes.
Turn off the heat and leave for 5 minutes. Drain.
Cut the spears into short lengths.
-
Meanwhile, trim
off the watercress stalks and chop the leaves,
reserving a few small sprigs for garnish. Mix with
the parsley.
-
Whisk the eggs in a saucepan with the
lemon juice. Gradually whisk in the melted butter.
-
Cook, whisking all the time, over a gentle heat
until thickened. Do Not allow to boil or the mixture
will curdle.
-
Season with the sugar and a little salt
and pepper. Add the asparagus and allow to heat through very
gently.
-
Meanwhile,
cook
the rigatoni according to the packet directions. Drain. Add the
asparagus sauce and toss lightly.
-
Pile on to warm
plates and sprinkle with cayenne. Garnish with the
reserved watercress sprigs.