Thinly slice or shred the cabbage and place in a large bowl with the salt. Toss. Add the scallions, garlic, herbs and toss again.
Pour in the olive oil, lemon juice and sugar and toss well. Taste and adjust lemon to your liking. You could let this stand 10-15 minutes after tossing, and then re-taste, letting flavors meld a bit.
Add zaatar to taste.