Wash your cucumber use side of your box grater with largest holes to grate it. Transfer to a colander with a bowl underneath, sprinkle with salt and allow 25 minutes to pass while liquid drains from the grated cucumber.
Meanwhile, add the remaining ranch tzatziki ingredients into a bowl and mix well. Use your hands to squeeze out remaining liquid from the cucumber then add to ranch tzatziki. Adjust seasoning, ingredient amounts to your taste
Pre-heated your oven to 425F. Place a pot of water on your stovetop and turn heat to high. Trim your cauliflower of any green stems and discard plus trim off any discoloured florets (if any).
Once the water is boiling, add a generous amount of salt and place your head of cauliflower in and boil for 3 minutes. Remove with a slotted spoon and transfer to a sheet pan.
Drizzle the top of cauliflower with olive oil, salt, pepper and paprika and place in your pre-heated oven. Bake for 25 minutes or until just golden.
Transfer cauliflower to a large plate, drizzle with ranch tzatziki, pomegranate seeds and chives. Carve wedges and serve.