Preheat your air fryer to 375°F (190°C) if your air fryer has a preheating function. If not, you can obviously skip this. Clean and trim your head of cauliflower, removing the leaves and stem from the cauliflower head.
Cut the cauliflower into 1½-inch thick slices. Note that if your steak doesn't hold together, you can easily cook this as florets too.
Place a steak or two (however much fits in your air fryer basket in a single layer) into your air fryer basket or tray. Lightly spray both sides with an oil sprayer.
Sprinkle on the spices. Remember to divide the spice measurements by the number of slices you have. So for example, you would divide the 1 tsp. of garlic powder called for into a ¼ tsp. on each steak. Cook at 375 F. for 10 minutes. See notes in post above on attaining the consistency you want. Cooking time may vary between appliances.
While the cauliflower cooks, in a mixing bowl, mix together the sauce ingredients and whisk well to combine.
Remove the cauliflower steaks from the air fryer and serve with yogurt sauce over the top..
Notes
Please note that the nutrition data given here is a ballpark figure. Exact data is not possible.