My # favorite salad green ever is sorrel. It has a slight lemony flavor.
I grew crysanthemum microgreen and they were delicious.
Verdolaga is easy to grow here in mountainous Mexico. (Purslane)
It's ok in moderation, a little on the slimy side.
Very young okra freshly picked in a salad are delicious.
Beet greens!!!
Sunflower sprouts!!!