Chickpea Avocado Salad Sandwich

Name: Chickpea Avocado Salad Sandwich
Prep time: 20 min
Total time: 20 min
Cuisine: American
Ingredients: 1 (15.5 ounce) can chickpeas (drained and rinsed (about 1 3/4 cups) ($0.75)); 1 large avocado (cubed ($1.00)); 1/2 cup red onion (diced ($0.47)); 1/2 lemon (juiced ($0.29)); 1 tablespoon yellow mustard (($0.03)); 1/2 teaspoon garlic powder (($0.06)); 1/4 teaspoon black pepper (($0.01)); 1/4 teaspoon sea salt (($0.01)); celery (thinly sliced); dulse flakes; Old Bay Seasoning (for fishy flavor); relish; pickled jalapeño nacho slices (mild); 4 slices bread (($0.74)); tomatoes; red onion; sprouts; yellow mustard; hummus; dill pickles; mixed greens