Extremely Frugal Custard Base For Fruit Tart

Custard Base For Fruit Tart
Originally uploaded by Simply Frugal

Milk	3/4 C
Sugar	1/4 C
Flour	2 Tbsp
Egg yolks	2
Vanilla extract	1 Tbsp

Heat milk to scalding. (I find a microwave does this better than the stovetop).
Combine sugar, flour, and egg yolks in the top of a double boiler set over hot water.
Stir with wire whisk until it becomes light. Gradually stir in hot milk until well blended.
Cook, stirring continuously, until mixture is about to boil. It thickens and coats the spoon.
Cook 30-40 minutes, just simmering.
Remove from heat and stir in vanilla. Keep stirring until custard cools.
Chill completely, setting saucepan in ice water. Refrigerate, well covered, until ready to use.