Preheat oven to 400℉ and line a large baking sheet with parchment paper.
Place cauliflower florets on baking sheet in a single layer.
Sprinkle garlic salt and pepper over florets, then spray cooking oil. Toss well with your hands.
Bake in oven for 20-30 minutes to desired crispness.
While cauliflower is baking combine sauce ingredients in a small sauce pan over medium heat. Whisk until well combined for 4-5 minutes until thick consistency.
Remove cauliflower from oven and toss in sauce, or pour sauce over cauliflower.