Mashed Celery-root Potatoes

Ingredients

• 12 servings pepper black freshly ground
• 6 tablespoons butter 
• 3  celery roots 
• 0.3 cup heavy whipping cream 
• 4 pounds russet potatoes 
• 1 tbsp salt 

Equipment

• bowl
• pot
• potato masher

Directions

1. Peel celery roots and cut into 1-in. pieces. Put in a large pot. Scrub potatoes and cut into 2-in. pieces; add them to pot with celery roots. Cover vegetables with cold water and bring to a boil.
2. Add 1 tbsp. salt and cook until vegetables are tender when pierced with a fork, about 10 minutes.
3. Drain well.
4. Transfer hot vegetables to a large bowl and mash with a potato masher or a large fork.
5. Add butter and cream and stir to combine well. Season with salt and pepper to taste.
6. Serve warm.