Crispy Falafel with Tahini Sauce

Ingredients

• 1 cupdried chickpeas, soaked overnight in water and drained (not canned)
• 1small yellow onion, roughly chopped
• 4 clovesgarlic
• 1 cupfresh parsley leaves, packed
• 1/2 cupfresh cilantro leaves, packed
• 1 1/2 teaspoonsground cumin
• 1 teaspoonground coriander
• 1/2 teaspoonbaking powder
• 1 1/2 teaspoonssalt, plus more to taste
• 1/4 teaspooncayenne pepper
• 3 tablespoonsall-purpose flour
• 4 cupsneutral oil, for frying (such as canola)
• 1/3 cuptahini
• 3 tablespoonsfresh lemon juice
• 2 to 4 tablespoonswater
• 4pita breads, for serving