Stone (Granite) Mortar and Pestle, 8 In, 3+ Cup Capacity

People may think I'm insane, but IMO old-school with a mortar and pestle is the way to go for pesto. It produces a paste instead of a puree. I have this one, but it's not on sale and doesn't look like it ever goes on sale. https://www.amazon.com/dp/B00016QXYK

I bought one of these some 14 years ago. I've been happy with it. https://www.amazon.com/dp/B00016QXYK