In a large bowl, add salmon and flake the fish into small chunks. Add green onions, dill, egg, mustard, lemon zest, salt and pepper, and mix with a fork until well-combined. Add ¼ cup breadcrumbs and mix to combine. Set the remaining 2 tablespoons of breadcrumbs on a small plate

In a medium bowl, mix all of the yogurt sauce ingredients together. Set aside in the fridge while you cook the salmon patties.

Form the salmon mixture into ¼ cup sized patties and set aside on a plate. You should have 8 patties. Coat each patty in remaining breadcrumbs, pressing to adhere the breadcrumbs.

In a large nonstick skillet, heat oil over medium heat. Add patties and cook until golden brown, about 4 minutes on each side.

Serve the cooked patties with chilled yogurt sauce.