Place the cauliflower in a saucepan with the broth and garlic. Bring to a boil, then reduce the heat to maintain a simmer. Simmer for 15 to 20 minutes, until the cauliflower is overcooked.
Pour the mixture into a high-speed blender. Cover the lid of your blender with a tea towel to make sure you don’t burn yourself. Blend for 1 minute, until completely smooth. Taste and season with salt if desired. If too thick, thin with additional broth or water.
