Asparagus with Bolzanina sauce

Ingredients

• 2 kg white asparagus,
• 1 tsp. butter,
• 1 pinch sugar,
• 2 tbsps. white wine,
• salt,
• 2 eggs,
• 2 tsps. mustard,
• ground white pepper,
• 2 tbsps. hot water,
• 150 ml oil,
• 3 tsps. white wine vinegar,
• 2 tbsps. finely chopped chives,
• 2 tbsps. grated parmesan cheese,
• 50 g melt butter,
• 1 tbsp. chopped chives,
• 8 slices cooked ham,
• 1 tbsp. herb oil