To make pesto: chop a bunch of parsley, a bunch of basil, fried any nuts (peanuts, hazelnuts, almonds, cedar, Brazilian, etc.), 50 g of parmesan cheese (broken into pieces), a clove of garlic, salt, pepper, ch. m. to taste.
Start mixing everything into a paste by adding a little olive oil. We will need a thick mass this time, so perhaps 150 ml of oil will be a lot.
Stop the blender, try it, add a little lemon juice or white balsamic.