Begin by draining and rinsing one can of chickpeas. In a large mixing bowl, mash the chickpeas using a fork or potato masher until chunky but still slightly whole—this should take about 2 minutes.

Add to the bowl your choice of mayonnaise, Dijon mustard, chopped celery, diced onion, lemon juice, salt, and pepper. Stir the mixture vigorously for about 1-2 minutes until everything is well combined and creamy.

Take your toasted slices of bread and generously spread the chickpea salad mixture over one side of each slice. If you're a fan of cheese, add a slice or sprinkle shredded cheese on top of the chickpea salad.

Heat a non-stick skillet over medium heat. Carefully place the assembled sandwiches into the skillet and grill for 3-5 minutes on each side until golden brown and cheese is melted.

Once both sides are beautifully golden and crispy, remove the Chickpea Salad Melts from the skillet. Cut each sandwich in half and arrange them on a plate. Serve immediately.