"No-Tuna" Salad Sandwich

Ingredients

• 1 (15-ounce) can chickpeas, rinsed and drained
• 3 tablespoons tahini
• 1 teaspoon Dijon or spicy brown mustard
• 1 tablespoon maple syrup or agave nectar
• ¼ cup diced red onion
• ¼ cup diced celery
• ¼ cup diced pickle
• 1 teaspoon capers, drained and loosely chopped
• Healthy pinch each sea salt and black pepper
• 1 tablespoon roasted unsalted sunflower seeds (optional)
• 8 slices whole-wheat bread
• Dijon or spicy brown mustard
• Romaine lettuce
• Tomato, sliced
• Red onion, sliced