Drain the chickpeas into a colander and rinse them under water, then shake off any excess water, transfer the chickpeas into a large bowl, and using a potato masher or large fork, mash down on the chickpeas until they are semi-mashed, meaning it's ok if you have little chunks of chickpeas in there

Add the cottage cheese over the mashed chickpeas, along with the dijon mustard, chopped red onion, chopped celery, chopped dill pickles, grated garlic, and chopped chives, then add in the lemon juice, and season with salt & black pepper, mix together until well mixed, then gently push down on the mixture so everything is well bound together

Lightly toast the slices of sandwich bread

Add the chickpea mixture over the slices of toast, and top off with a couple slices of tomato and another slice of toast, enjoy!