Low-Carb Loaded Rutabaga Cauliflower Casserole
A comforting casserole that swaps traditional potatoes for rutabaga and cauliflower, creating a creamy, cheesy base topped with crispy bacon and green onions. The vegetables are sauteed until tender, then pureed with butter, sour cream, and almond milk for a rich, smooth texture. Perfect for keto dieters or anyone seeking a lighter alternative to loaded potato casserole. The combination of sharp cheddar and smoky bacon delivers all the familiar flavors of the classic dish while keeping carbs minimal.
Ingredients
- 3 tbsp butter or ghee
- 1 large swede, peeled and roughly chopped
- 1 small cauliflower head, cut into florets
- ½ tsp sea salt
- ¾ cup grated cheddar cheesenutritional yeast1/4 cup per 1/2 cup cheesevegandairy-freedairy-free
adds umami flavor but different texture
Full guide → - 2 tbsp butter
- ½ cup sour cream
- ½ cup unsweetened almond milk or any seeds milk
- black pepper(optional)
- ½ cup grated cheddar cheesenutritional yeast1/4 cup per 1/2 cup cheesevegandairy-freedairy-free
adds umami flavor but different texture
Full guide → - 5 large slices bacon
- 1 green onion, green part only, sliced or chives
Instructions
- 1
Preheat oven to 375°F conventional or 350°F fan assisted
- 2
Line baking tray with greaseproof paper and arrange bacon rashers without overlapping
- 3
Bake bacon 10-15 minutes until golden brown, cool and crumble into pieces
- 4
Reduce oven to 350°F
- 5
Heat large fry pan over medium heat and add butter
- 6
Add swede and cauliflower, cook stirring for 5 minutes
- 7
Lower heat and cook covered 18-20 minutes until vegetables are soft, stirring occasionally
- 8
Cool slightly then process with butter, sour cream and almond milk until smooth and creamy
- 9
Season with salt and pepper, add grated cheese and pulse until just combined
- 10
Transfer mash to oven proof dish
- 11
Top with bacon, grated cheese and green onion
- 12
Cover with foil and bake 25 minutes
- 13
Remove foil and bake 5-10 minutes until cheese melts
- 14
Serve immediately
Tips
Cook vegetables until very tender to ensure smooth puree texture
Let casserole rest 5 minutes before serving to help set the layers
Save some bacon fat from cooking to add extra flavor to the vegetable mash
Good to Know
covered in fridge up to 3 days, reheat before eating
can assemble without final baking, cover and refrigerate overnight
immediately while cheese is melted and hot
Common Mistakes
process vegetables while too hot to avoid curdling dairy
undercook vegetables to avoid lumpy texture
skip foil covering to prevent cheese burning
Substitutions
Dairy-Free Swaps
adds umami flavor but different texture
Full guide →General Alternatives
FAQ
Can I make this ahead of time?
Yes, assemble completely and refrigerate overnight. Add 10-15 extra minutes to baking time if cooking from cold.
What if I don't have a food processor?
Use a potato masher or immersion blender, though texture won't be as smooth. Ensure vegetables are very tender first.
How long will leftovers keep?
Store covered in refrigerator up to 3 days. Reheat in oven at 180°C until warmed through, about 15-20 minutes.