Preheat the oven to 425 degrees and line a cooking sheet with foil. Spray foil with cooking spray.

Pour oil over the cauliflower in a large bowl and toss until coated.

Transfer to a ziplock bag and add cornstarch. Seal the bag and shake to coat.

Pour the cauliflower onto the prepared pan and bake for 15-20 minutes. After baking, turn the dial to broil and broil for 3-4 minutes or until cauliflower is slighlty browned.

Make the sauce by adding sugar, apple cider vinegar, soy sauce, garlic powder, onion salt and ketchup to a saucepan.

Heat sauce over medium high heat and bring to a boil.

Mix cornstarch and 2 tablespoons cold water in a small bowl. Add to the boiling sauce and stir until it has thickened a bit. Reduce heat to low until cauliflower is ready.

Transfer cooked cauliflower to a large bowl and add sauce. Toss to combine.

Garnish with herbs or green onions.