Drain the can of chickpeas into a strainer set over a bowl, reserving the liquid from the can.
Place all but the parsley and lemon zest into the bowl of the food processor fitted with the blade attachment or blender
Add 2 tbsp of the reserved chickpea liquid
Blend or process continuously, scraping down the sides of the bowl as needed to integrate any large chunks, until very smooth, about 5 minutes total.
If the hummus is thicker than you’d prefer, blend in more chickpea liquid one tablespoon at a time as needed to reach the desired texture and creaminess
Taste and season with more kosher salt and lemon juice as needed.
Scrape the hummus into a bowl, then drizzle with olive oil or top with haressa if desired.
Garnish with parsley and lemon zest.
. Serve with warm pita wedges, pita chips, olives, and / or raw vegetables.