01 -  Heat a large skillet over medium heat and add the unsalted butter. Allow it to melt completely. 
 02 -  Add the minced garlic and sauté for 1 minute until aromatic, avoiding any browning. 
 03 -  Add the cauliflower florets to the skillet and sauté for 3 to 4 minutes, stirring occasionally until slightly softened. 
 04 -  Pour in the heavy cream and whole milk. Stir thoroughly to combine ingredients. 
 05 -  Cover the skillet and let simmer for 7 to 8 minutes, or until the cauliflower is just tender. 
 06 -  Remove the lid. Add salt, ground black pepper, and optional crushed red pepper flakes. Sprinkle in the Parmesan cheese and stir until fully melted and the sauce thickens, about 2 to 3 minutes. 
 07 -  Fold in the chopped parsley and adjust seasoning to taste. Serve immediately, garnished with extra parsley and Parmesan as desired.