4 large eggs
2 tablespoons shredded chervil
2 tablespoons unsalted butter
4 tablespoons heavy cream
1/4 teaspoon salt
1/4 teaspoon freshly ground pepper
2 tablespoons creme fraiche
3 tablespoons (about 2 ounces) white sturgeon caviar or sevruga or osetra caviar
4 slices fresh melba toast for serving