Puff Pastry and Cream Cheese Sausage Rolls with 4 Ingredients

Ingredients (for about 12 rolls):
1 sheet of puff pastry (thawed, if using frozen puff pastry)

100 g cream cheese (you can also use herb cream cheese for extra flavour)

50 g grated cheese (e.g. cheddar or mozzarella)

1 tablespoon mustard (optional, for extra flavour)

Method:
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