Keto - Broccoli and cauliflower gratin with sausage - Diet Doctor

Prep Time

5 + 30 min

Prep Notes

Even the veggie-phobic love broccoli and cauliflower gratin. Who can resist the creamy, cheesy sauce with just enough mustard to make it interesting? Add the sausage, and it's a go-to low-carb meal for busy families. That was easy!

Cooking Time

20 min




  • 1 leek
  • 1 yellow onion
  • 1 lb broccoli, in florets
  • 8 oz. cauliflower, in florets
  • 1 lb sausages, precooked links
  • 2 oz. butter, for frying
  • 2 tablespoons Dijon mustard
  • 1 cup sour cream or crème fraîche
  • 5 oz. shredded cheese
  • 4 tablespoons fresh thyme
  • salt and pepper


  1. Preheat the oven to 450°F (225°C).
  2. Coarsely chop the leek and onion. Chop the broccoli and cauliflower florets into ~1” chunks. Slice the sausage links into 1” pieces.
  3. Fry onion and vegetables in butter in one pan and the sausage in a separate pan.
  4. Put the vegetables in a baking dish, blend the mustard with the sour cream and pour over the vegetables.
  5. Add the sausage and cheese on top and season with thyme.
  6. Bake in oven on upper rack for 15 minutes.


You can use raw sausage links in this recipe. If so, allow extra cooking time and cook through before slicing into pieces.