Brush the perch with the oil, sprinkle with seasonings.
Broil in the oven for 3-5 minutes per side.
Beat the egg yolks with the sugar in the top of a double boiler until foamy and pale in colour.
Place over the boiling water.
Slowly add the sherry beating continuously until mixture becomes thick and foamy.
Remove from heat, stir in the strawberries.
Place perch on a serving platter and pour half the sauce over the perch and serve with the remaining sauce on the side.