Beef sirloin with tarragon butter and creamy gratin

Beef sirloin with tarragon butter and creamy gratin

Tender. Juicy. Elegant. Low carb! This outrageously succulent beef sirloin comes with a creamy gratin and flavorful tarragon butter that you can whip up in no time. We suspect it's the perfect main course for your New Year's Eve celebrations.

Beef sirloin with tarragon butter and creamy gratin

Tender. Juicy. Elegant. Low carb! This outrageously succulent beef sirloin comes with a creamy gratin and flavorful tarragon butter that you can whip up in no time. We suspect it's the perfect main course for your New Year's Eve celebrations.
USMetric
6 servingservings

Ingredients

Creamy gratin
  • 1 lb 450 g celery root
  • ½ lb 225 g turnip
  • 3 oz. 75 g carrotcarrots
  • 2 2 garlic clove, mincedgarlic cloves, minced
  • 1¾ cups 425 ml heavy whipping cream
  • 2 oz. 50 g parmesan cheese
  • salt and pepper
Tarragon butter
  • 5 oz. 150 g butter, room temperature
  • 2 tsp 2 tsp dried tarragon
  • 1 tsp 1 tsp cider vinegar
  • ½ tsp ½ tsp onion powder
  • ½ tsp ½ tsp sea salt
  • ¼ tsp ¼ tsp ground black pepper
Beef sirloin
  • 2 lbs 900 g sirloin steak
  • 2 tbsp 2 tbsp butter
  • salt and ground black pepper
Serving
  • 513 oz. 150 g leafy greens
  • 6 6 cherry tomatoes

Instructions

Instructions are for 6 servings. Please modify as needed.

Creamy gratin

  1. Preheat the oven to 350°F (175°C).
  2. Peel and slice the root vegetables thinly. Heat the heavy cream in a saucepan, press in the garlic. Salt and pepper.
  3. Lower the heat and add the vegetables. Let simmer for 10 minutes on medium-high heat. Stir in the shredded parmesan, save some for the gratinating. Distribute into ramekins and top with the rest of the parmesan cheese.
  4. Bake in the oven for 20 minutes while you prepare the meat and the butter. You can also prepare the gratin the day before and just heat up when serving. Raise the heat or turn on the grill function towards the end for a nice golden result.

Tarragon butter

  1. Melt one-third of the butter on medium heat until it turns amber in color and smells nutty. Set aside and allow to cool slightly.
  2. Add tarragon, vinegar, onion powder, salt and pepper.
  3. Whisk the remaining butter into the melted butter and keep whipping with a hand mixer until fluffy.
  4. Keep in the refrigerator but bring to room temperature 15 minutes before serving.

Beef sirloin

  1. Pat the meat dry with a kitchen towel. Rub with salt and pepper on both sides.
  2. Put in a greased oven dish. Insert a meat thermometer in the thickest part. Roast in the middle of the oven until the inner temperature reaches 130°F (54°C), it takes about 30 minutes.
  3. Remove from the oven and allow rest for a few minutes. Cut into slices. Serve with leafy greens, some tarragon butter and the creamy gratin.

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2 comments

  1. lisa
    THIS is more like it! Anna's recipes are the best, REAL ingredients every time. Staying true to what sets Diet Doctor apart from the rest!
  2. Jolene
    We loved the steak and tarragon butter. My kids and husband didn't like the creamy gratin I thought it was enjoyable.

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