Preheat the oven to 200 degrees Celsius or put you air fryer on 200 degrees and set it to 10 minutes.
Combine diced sweet potatoes, tomato and herb seasoning with just a little olive oil.
Place in an oven safe baking pan and bake in the oven for 12-14 minutes or in the air fryer for about 10 minutes. Check to see if the potatoes are done.
Meanwhile combine greek yogurt with lemon juice and tahini. Season with sea salt to taste. You can also add some grated garlic if preferred.
Assembly the salad by putting lettuce leaves at the bottom of a plate or bowl.
Add sweet potatoes, all the vegetables, olives, artichokes and arugula. Top with crumbled feta cheese and tahini yogurt dressing.