Bring a pot of heavily salted water to a boil. Add the whole cauliflower head and boil until tender, flipping the cauliflower halfway through, about 10 to 12 minutes total. Remove and let drain.
1
Heat oven to broil on high. Place it on a baking sheet and drizzle with the olive oil. Season with salt and pepper
2
Broil until the cauliflower is lightly charred on the top, about 5 minutes, checking occasionally.
3
Add cauliflower to a mixing bowl and break into smaller pieces with tongs.Top with the tahini, zhoug, green onions, sesame seeds, tomatoes, and diced radishes, tossing to combine.
4
Pile into the warmed pitas with pickled onions and arugula and serve.
5