"A healthy alternative to Alfredo or white sauce. Freezes beautifully and can be used on pasta, potatoes, other veggies, or on pizza. You won't believe how good this is - even my very picky son loved it! Can be made Paleo, vegetarian, or dairy free. Use immediately or freeze for up to 6 months."
Melt butter in an electric pressure cooker on the "Saute" setting. Add garlic; cook and stir until fragrant, about 2 minutes. Add cauliflower and chicken stock. Seal cooker and bring to high pressure according to manufacturer's directions. Cook for 6 minutes.
Release pressure naturally according to manufacturer's instructions. Remove the lid carefully. Blend cauliflower with an immersion blender until creamy. Thin with water to desired consistency; stir in Parmesan cheese. Season with salt and pepper.