Place a flat baking tray in the oven and preheat the oven to 200C/400F/Gas 6.
Pour the double cream into a saucepan over a high heat. Bring to the boil, then remove from the heat immediately and leave to cool for one minute.
Place the egg whites into a bowl and whisk until stiff peaks form.
Place the egg yolks and grated cheese in a separate bowl. Whisk together and season well with salt and freshly ground black pepper.
Pour the warm cream over the egg yolks and cheese and mix together well.
Spoon a little of the stiff egg whites into the yolk mixture and mix well.
Add the rest of the egg white and gently fold together with a metal spoon, being careful to maintain volume.
Spoon the soufflé mixture into the pepper half, place onto the hot baking tray and place into the oven to bake for 8 minutes, until the soufflé has risen and is golden.
To serve, place the pepper into the centre of a small warm plate.
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