Amaranth Tabbouleh with Chickpeas

Name: Amaranth Tabbouleh with Chickpeas
Prep time: 5 min
Cook time: 30 min
Total time: 35 min
Cuisine: Middle Eastern
Ingredients: 1 1/2 cups water; 1/2 cup uncooked amaranth; 1 large cucumber; 3/4 cup fresh parsley (chopped); 1 small red onion (finely diced); 1 cup cherry tomatoes; 1/4 cup fresh mint (chopped); 2 tbsp olive oil; 1/2 cup pine nuts; 1 1/2 tsp lemon zest; 1/4 tsp fine sea salt (plus more to taste); 3/4 cup feta cheese (crumbled (optional)); 1/4 tsp crushed red pepper (plus more to taste); 1 can chickpeas (drained and rinsed); 1 1/2 tbsp lemon juice; Pinch black pepper