Wash the asparagus. Peel white asparagus. Cut the woody ends off the whole asparagus. Put the asparagus ends and peel in a pot and cover with water. Add 1 pinch of sugar and salt, bring to the boil and simmer for about 15 minutes.
Pour the brew through a sieve and collect. Wash and slice the lemon. Put n2 lemon slices and 20 g butter in a pot. Add the asparagus stock and bring to the boil. Cook the white asparagus for about 25 minutes.
Add green asparagus after 10 minutes. Meanwhile wash the meat, dab dry and season with salt and pepper. Fry in hot oil for 10-15 minutes until golden brown. Bring the hollandaise sauce to the boil with 1/4 litre of asparagus stock.
Stir in the remaining butter. Wash the basil and chop finely, except for a little garnish. Stir the basil into the sauce and season to taste. Arrange meat, asparagus and some sauce on a plate. Garnish with remaining lemon slices and basil and serve the rest of the sauce separately.