Harvest your basil, stem and wash
Measure and sort walnuts checking for shells
Peel garlic clove (use more if you like)
Process briefly until well blended
Measure olive oil and add slowly to bowl while processing. ¼ cup is a recommendation – only add as much as you think looks right. You'll want the pesto to be thick, but not too thick.
When the consistency is right, add your salt.