Finely chop the washed and drained wild garlic with a chopping knife.
Melt butter in a saucepan, stir in flour and slowly pour in beef broth, stir in wild garlic. Bring soup to a boil again.
Remove pot from heat, thicken soup with egg yolk and stir until thickened.
Return soup to stove top, bring to a gentle simmer and season with salt, pepper, lemon juice and anchovy paste.
Stir sour cream and whipped cream into the wild garlic soup, season with nutmeg and serve hot with white bread cubes tossed in melted butter and bacon crumbles.