Beat egg yolks until thick. Add cream, butter, and jam. Combine 1/2 c. sugar, salt and cornstarch. Add to first mixture. Mix thoroughly. Pour into pastry-lined pie pan. Bake in hot oven (425 degrees) about 25 minutes. Cover with meringue made of egg whites and 3 T. sugar. Brown in slow oven (325 degrees) 20 minutes.