Chop the white chocolate and melt it together with the butter in a double boiler, stirring constantly. Once melted, let it reach room temperature. In a bowl, mix the eggs with the sugar without beating. Add the white chocolate and butter mixture, then the sifted flour. Mix and pour the preparation into the Flip. Add the quartered red fruits on top, mixed with the jam. Spread the mixture over the dough. Cook over crown fire for approximately 25 minutes. Unmold, cut into squares and serve.