Cut the avocado in half, remove the pit, and score its flesh with the tip of a knife. Then, scoop the flesh out and add it to a food processor.
Peel the garlic, cut it in half lengthwise, and remove its core, if any, with the tip of a knife. Next, slice the garlic and add it to the food processor.
Add the rest of the ingredients to the food processor: tahini, freshly squeezed lemon juice, salt, and black pepper.
Pulse until you reach your desired texture. You might have to stop once or twice to scrape down the sides of the food processor. We think the avocado spread should be almost completely smooth, without too many avocado pieces.
Taste, adjust for salt and lemon juice, then transfer to a bowl and serve as a dip or a spread.