Herby Avocado Hummus

Name: Herby Avocado Hummus
Cuisine: Middle Eastern
Ingredients: ½ large ripe avocado; 1 15½-ounce can chickpeas, rinsed, drained; ⅓ cup tahini (such as Soom), well mixed; ¼ cup plus 1 tablespoon fresh lime juice; 1 garlic clove, finely grated or smashed to a paste with flat side of knife on cutting board; ¾ teaspoon (or more) kosher salt; 10 cranks freshly ground black pepper; ¼ teaspoon ground cumin; 1 cup cilantro leaves with tender stems; 2 tablespoons olive oil, plus more for drizzling; Toasted pumpkin seeds (pepitas; for serving)