Toast the pine nuts in a dry frying pan until just golden. Watch carefully — they burn quickly.

Add pine nuts, basil, garlic, a few glugs of oil and a pinch of salt to a food processor. Blend, adding more oil until it forms a paste.

Turn out into a bowl. Add pepper, grated parmesan and a little more oil. Mix together.

Taste. It probably needs more cheese, salt or oil. Add a little of what you think it needs, taste again, and repeat until you're happy.