Homemade Pesto Note: If you’d rather skip the jar, blend 2 packed cups fresh basil, 1/2 cup grated Parmesan, 1/4 cup pine nuts or walnuts, 1 garlic clove, 1 tablespoon lemon juice, 1/2 cup olive oil, plus salt and pepper to taste until smooth. Use it right away in your chicken pesto pasta, then store leftovers in the fridge (covered with a thin layer of olive oil) for up to 5 days or freeze in small portions for easy future dinners.