
Add the yogurt into a large bowl, along with the dijon mustard, grated garlic, dried dill, lemon juice, and season with salt & pepper, whisk together
Add the chopped cucumber into the bowl with the yogurt sauce, along with the chopped red onion, and chopped parsley, mix together
Lightly toast the slices of sandwich bread, then add the creamy cucumber mixture over a slice of toast, top it off with some slices of tomato, season with salt & pepper, add some more of the creamy cucumber mixture to the top slice of toast, and place it over the sandwich, enjoy!