Arrange the strawberry pieces in two gratin dishes. Set aside.
Whisk together the egg yolks and sugar in the top of a double boiler (off the heat). Slowly add the orange juice and combine. Whisk the mixture over boiling water until thickened. Add a little white pepper, to taste.
Divide the sauce over the strawberries, but only use enough to cover the base of the dish. Allow some of the berry tips to show through the sauce. Brown under a broiler for 1 to 2 minutes. Watch carefully.
Place the gratin dishes on serving dishes, top with a mint sprig, and serve.