In a food processor, add cauliflower in batches and process until fine crumbs. Smaller than in my photos. In the last batch, add garlic. Preheat oven to 400 degrees F.
Preheat non-stick skillet on medium – high heat and spray with cooking spray. Add cauliflower and cook for 5 – 7 minutes or until a bit golden, stirring frequently and watching closely not to burn.
In the meanwhile, whisk the eggs in a medium bowl. Add cornstarch and whisk until dissolved. Add pre-cooked cauliflower along with cheese (except 3 tbsp), salt, pepper and green onions; mix well.
Line muffin tin with liners or use silicone muffin tin sprayed with cooking spray. Divide mixture evenly among openings and top with remaining 3 tbsp cheese. Bake for 25 minutes. Remove from the oven, let cool a bit and serve hot or cold (I like).