Fruitcake Trifle

Yield:	1 servings
Categories:

10	lg	Egg yolks
3/4	c	Sugar
2 3/4	c	Milk
3/4	ts	Freshly grated lemon zest
3/4	c	Heavy cream
1 1/2	ts	Vanilla
1/2	c	Sour cream
5	ts	Unflavored gelatin
		Thirty-six 2-inch-square fruitcake slices; each 3/8 inch thick