Wash and peel the asparagus, being careful not to break them. Put the asparagus in a large saucepan with salted water, lemon juice, sugar, butter (1) and the 2 slices of bread, bring to the boil and cook until al dente. (The bread soaks up the bitter asparagus a little)
Drain the asparagus and place in a buttered gratin dish.
While the asparagus is cooking, melt the butter (2) in a small pan, crumble the Gorgonzola and stir until it has melted. Add the cream, let it simmer for 1 minute, season to taste with salt, pepper and the herbs.
Pour the whole thing over the asparagus and place in the oven preheated to 200 degrees for 4-5 minutes.