I’ve made cauliflower mash and celery root mash as separate dishes before, but I thought it would be good to combine the two vegetables. Celery root, or celeriac, is an ugly, lumpy root ball from the celery family (it's not the familiar celery, though). While the outside of this root is unattractive, the unique flavor is fresh and mild with the texture of a potato. This side dish is a wonderful healthy alternative to mashed potatoes, without sacrificing any flavor.
1 large head cauliflower, florets removed
1 celery root, peeled and diced
2 large cloves garlic, peeled and smashed
2 tablespoons butter
½ cup milk
1 teaspoon fresh thyme leaves
Kosher salt
Freshly ground black pepper
Directions
Place cauliflower, celery root, and garlic in a large stock pot and cover with water. Bring to a boil and allow vegetables to cook until soft enough to pierce easily with a knife, about 15 minutes.
When vegetables are done, drain and place in a food processor. Add butter, milk, and thyme. Process until smooth. Salt and pepper to taste.