Feel free to replace the water with milk, cream, goat cheese, cashew or sunflower cream (to make it dairy free), dairy-free milk, yogurt, or sour cream. It just depends on the flavor you prefer.Another addition is to add about 1/4 cup of shredded cheddar cheese, or another aged cheese.
Preheat your oven to 400°F (200°C, or gas mark 4).
Prepare a baking sheet with parchment paper.
Slice the cauliflower into pieces and add it all to a mixing bowl.
Add olive oil, salt, and garlic to the bowl, and blend well to fully coat the cauliflower.
Place the cauliflower on a baking sheet and bake for about 20 minutes, or until they are browning around the edges.
Take the cauliflower out of the oven, and place in a food processor or blender.
While warm, place in a food processor or blender. Add up to a cup of very warm water or milk to the food processor. Add enough water to get the mashed cauliflower to a consistency you like. It should be very similar to mashed potatoes but a bit lighter in weight.
Add salt and pepper to taste.
Store in the refrigerator for a few days, or freeze for a few months.