Creating delicious Chickpea Salad Sandwiches is easy with these simple steps:

1. Prepare Chickpeas: In a large mixing bowl, use a fork or potato masher to mash the chickpeas, leaving some whole for texture.

2. Add Vegetables: Incorporate the chopped celery, red bell pepper, and red onion into the mashed chickpeas.

3. Mix Dressing: In a separate small bowl, whisk together Greek yogurt, mayonnaise, Dijon mustard, lemon juice, garlic powder, salt, and pepper.

4. Combine: Pour the dressing over the chickpea mixture and stir well until all ingredients are evenly coated.

5. Adjust Seasoning: Taste and adjust the seasoning with more salt, pepper, or lemon juice as necessary.

6. Assemble Sandwiches: Take slices of whole grain or gluten-free bread and generously spread the chickpea salad mixture on one slice.

7. Top It Off: Place another slice of bread on top to make a sandwich. If desired, garnish with fresh parsley or cilantro.

8. Slice and Serve: Cut the sandwiches in half for easy eating and serve immediately or store in the refrigerator for later.

These steps will guide you in whipping up these incredible sandwiches efficiently.