To begin making this meal, start with the Cauliflower Mash. Chop one large head of cauliflower into pieces. Place the cauliflower in a large pot with 8 cups of water and place it on the stove over medium-high heat. Bring to a boil and then cover the pot and reduce the heat to medium-low. Cook for 10-15 minutes until the cauliflower is tender all the way through when stuck with a fork.
While the cauliflower is cooking - add 1/2 tsp of minced garlic, 1/4 cup of sour cream, 1 tbsp of olive oil, 1 1/4 tsp of salt, and a 1/4 tsp of pepper to the food processor. Also, chop the chives and place them in a small bowl.
Once the cauliflower is soft, drain off all the water and add the cauliflower to the food processor as well. Run the processor until the cauliflower is puréed and all the ingredients are thoroughly combined. You may need to stop and scrape down the sides to make sure everything gets mixed well.
Scoop the cauliflower mash out of the food processor into a heat-proof serving bowl and sprinkle with chives. Cover with tinfoil and place in the oven on warm until other elements are done and dinner is ready!