Falafel Sandwich

Name: Falafel Sandwich
Prep time: 5 min
Cook time: 25 min
Total time: 30 min
Yield: 4
Ingredients: Ingredients; 1 (15 oz) can chickpeas, drained and rinsed (or 1 1/2 cups cooked chickpeas); 1/2 cup fresh parsley, chopped; 1/4 cup fresh cilantro, chopped; 1 small onion, finely chopped; 3 cloves garlic, minced; 1 teaspoon ground cumin; 1 teaspoon ground coriander; 1/2 teaspoon smoked paprika; 1/2 teaspoon baking soda (for crispiness); 1/2 teaspoon salt; 1/4 teaspoon black pepper; 2 tablespoons all-purpose flour (or chickpea flour for gluten-free); 1 tablespoon lemon juice; 1 tablespoon olive oil; 1-2 tablespoons water (if needed); 4 pita breads or flatbreads; 1 cup shredded lettuce; 1/2 cup chopped tomatoes; 1/4 cup sliced cucumbers; 1/4 cup red onion, thinly sliced; 1/3 cup tahini; 2 tablespoons lemon juice; 1 clove garlic, minced; 2-3 tablespoons water (to thin); 1/2 teaspoon salt