best hummus ever! — Les Petites Gourmettes

Ingredients

• 1 1/2 cups (about 3/4 pound) dried chickpeas (also known as garbanzo beans)
• 1 medium onion, peeled and halved
• 1 tablespoon plus 1 teaspoon salt, divided
• 1/2 cup tahini, well stirred before measuring
• 4 small garlic cloves, peeled and mashed with a teaspoon of kosher salt
• 1/3 cup fresh lemon juice, and more to taste
• 1/4 cup olive oil
• Ground cumin
• Additional olive oil for drizzling