Put the pan on the fire, spread the sauce, add the cheese there, add olive oil and heat until it's time to melt the cheese, stirring constantly (you can add a little water to make the sauce become thinner) as soon as the cheese melts, put it back in the blender, add basil, lemon juice, and whisk again. Be sure to taste, you may need to add salt and pepper. If you like the taste and you don't need to add anything, serve with meat, chicken or anything else, I had potatoes and baked chicken in a rustic way).