560 g  Baby Spinach

2 tbsp  Butter

0.5  Brown Onions , finely chopped

2  Garlic Cloves , minced

0.5 cups  Milk

0.25 cups  Double Cream

110 g  Cream Cheese

Kosher Salt

Ground Black Pepper

Cayenne Peppers , a pinch

0.25 cups  Parmesan Cheese , freshly grated