Drain and rinse the chick peas and put them in a food processor with the humus, parsley, garlic and olive and process until it forms a very smooth paste.
Add your warm water a little at a time to help smooth out the chick peas while your processing them. Humus is a dip and isn't supposed to be chunky.
Salt and pepper to taste and add the lemon juice to taste as well. I should be just a tiny bit tart.
Remove the Humus to a nice decorative bowl and decorate with a few olives and the paprika.
If you are using the sumac seeds, heat the additional oil until hot and add the sumac seeds. Be careful they will spit and splatter. Fry for about 30 seconds and then pour over the Humus.
If you don't use the sumac seed drizzle a little olive oil over the Humus after decorating it.