Gather all ingredients before starting the recipe.
Pre-heat oven to 400℉
Add 1 cup roast lamb cut into cubes, 1 large carrot, peeled and thinly sliced, 1/2 medium cauliflower cut into florets to a medium sized bowl.
Combine 1 400 ml jar prepared Biryani or Tikka Masal curry, 1 cup yogurt or crème fraîche and 1/2 cup chicken stock in another bowl and stir to combine.
Combine sauce ingredients and vegetable and lamb and toss to combine. Season with kosher salt and freshly ground black pepper.
Transfer lamb and vegetable ingredients to a casserole dish and sprinkle parboiled basmati over the mixture. Cover the dish tightly with a lid or aluminum foil and bake at 400℉ for an hour.