method
1. Split muffins in half and toast on both sides under a hot grill.
2. Melt herb butter and generously brush both sides of each mushroom, then place under a hot grill and cook them for 2 minutes on each side.
3. Bring a large saucepan of water to simmering point and carefully crack the eggs into it.
4. Poach the eggs for 3-4 minutes, then remove them from the pan with a slotted spoon and drain on absorbent kitchen paper while making the sauce.
5. In a small pan, bring the vinegar and 3 teaspoons water to the boil and reduce by half.
6. Put egg yolk into a blender or food processor and process for 30 seconds, at the same time pouring in the hot vinegar.
7. Then slowly add the melted butter. Season to taste.
8. Put a mushroom on top of each half muffin, top with an egg and spoon over some of the sauce.
9. Garnish with sprigs of chervil and serve at once.
serving amount
serves 4.
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