Kahlua custard filling

1. In heavy saucepan, heat milk until almost boiling.
2. Stiri in sugar.
3. Remove sweetened milk from heat & gradually add eggs, stirring constantly.
4. Return to heat.
5. Cook over low heat stirring steadily until custard thickens.
6. Remove custard from heat & stir in vanilla & kahlua.
7. Cover & cool.