If you modify the instructions so that you make a custard BEFORE pouring the liquid into the ramekins, this will help to suspend the vanilla seeds in the mixture so they do not just fall to the bottom.
original instructions:
Meanwhile put the yolks and caster sugar into a medium-sized heatproof bowl and stir until just combined. When the cream begins to
boil, remove the vanilla pod and then pour the cream on to the yolk
and sugar mix, stirring constantly to mix.
Divide the mixture between the ramekins and pour cold water into the tin until it comes two-thirds of the way up the ramekins. Bake for
about 40 minutes until the custard is set – it should only wobble
faintly when shaken. Cool and then chill until cold.
new instructions:
- Meanwhile put the yolks and caster sugar into a medium-sized heatproof bowl and stir until just combined. When the cream begins to
boil, remove the vanilla pod and then pour the cream on to the yolk
and sugar mix, stirring constantly to mix.
2b. Return the combined egg/cream mixture to the pot, and cook over
moderate/low heat, and cook while stirring constantly until a custard
is formed. Be careful not to allow the mixture to sit too long without
stirring, and also avoid high heat. If you do not feel confident
making custard directly over heat, you can do this over a double
boiler, which will help to prevent scorching and making scrambled
eggs.
2c. Remove the custard from the heat.
- Divide the mixture between the ramekins and pour cold water into the tin until it comes two-thirds of the way up the ramekins. Bake for
about 40 minutes until the custard is set – it should only wobble
faintly when shaken. Cool and then chill until cold.
having made a custard, the baking time will surely also be reduced, however i can not confirm how long it should be baked for using that particular recipe when employing a custard.