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| 4 egg yolks |  | Whisk | Heat, stirring constantly, until custard thickens, which will happen quite quickly. | Strain through a fine sieve; chill; freeze in ice-cream machine. |  
| 175ml milk | Boil |  | Pour in slowly, whisking |  
| 125g sugar cubes |  |  | Heat in a heavy pan, stirring/mashing constantly, to get a deep caramel throughout | Mix in |  
| 1 vanilla pod | split in two |  
| 100ml cream |  | Remove from heat, pour in. Return to heat, stir gently until caramel melts completely |  |