Cut the pepper to fit the feed tube.
Assemble the Food Processor bowl onto the power unit.
Fit the Dicing disc, attach the lid and ensure it is locked into place.
Fit the dicing grid into the feed tube.
With the machine running, dice Ingredients 1 (cucumber, pepper, onion, tomatoes) into the Food Processor bowl using the dicing pusher.
Dice on speed Max and firmly press down.
Transfer content of the Food Processor bowl into a clean large mixing bowl, batch by batch.
Retrieve, clean the Food Processor bowl and fit the Knife Blade.
Add Ingredients 2 (onion, parsley) into the Food Processor bowl.
Attach the lid and ensure it is locked into place.
Chop until finely chopped.
Transfer content of the Food Processor bowl to the mixing bowl.
Mix until combined.
Add the first 3 items of Ingredients 3 (oil, lemon juice, seasoning) into the mixing bowl.
Transfer content of the mixing bowl into a clean large serving bowl.
Sprinkle the remaining item of Ingredients 3 (sumac) over the top.