Sous Vide Halibut, White Asparagus Risotto, and Strawberry Rhubarb Compote

Strawberry and Rhubarb are a classic combination often used in sweet dishes like pies.  Here is takes on a more savory tone but still brightens up and adds color to a dish featuring another spring favorite, white asparagus.  With the rhubarb season being pretty short, I usually make a large batch of the compote and freeze it for later use.  While the process looks very long, many things can be done in parallel while ingredients steep and cook.  This dish is adapted from a recipe by the Voltaggio brothers’ cookbook VOLT ink..

Sous Vide Halibut, White Asparagus Risotto, Strawberry Rhubarb Chutney

 

Ingredients

 

Braised White Asparagus

  • 450g White Asparagus
  • 15g Grapeseed Oil
  • 125g Sliced Onion
  • 10g Chopped Fresh Ginger
  • 1300g Cold Water
  • 1 Bay Leaf
  • 2 Sprigs Thyme
  • Grated Zest of One Lemon
  • 24g Sugar
  • 20g Fine Sea Salt

 

Strawberry Syrup

  • 120g Cold Water
  • 120g Dry Riesling
  • 50g Sugar
  • 2g Fine Sea Salt
  • 450g Strawberries, Cored

 

Rhubarb Compote

  • 70g Verjus
  • 60g Strawberry Syrup (from above)
  • 150g Diced Onion
  • 250g Diced Rhubarb
  • 0.5g Ground Coriander
  • 0.5g Ground Cinnamon

 

White Asparagus Risotto

  • 900g Asparagus Stock (from braised white asparagus above)
  • 56g Butter
  • 30g Olive Oil
  • 75g Finely Diced Onion
  • 200g Arborio Rice
  • 240g Dry White Wine
  • 70g Grated Parmesan Cheese
  • Reserved White Asparagus Spears (from above)

 

Sous Vide Halibut

  • Four 150g Halibut Filets, Skinned
  • 1000g cold water
  • 35g sugar
  • 50g fine sea salt
  • 28g Olive Oil

 

Preparation

 

Braised White Asparagus

  • Cut the bottom 2 inches off the asparagus spears and reserve.
  • Cut the top 2 inches of the asparagus spears and reserve.
  • Cut the remaining asparagus spears into ¼ inch pieces and reserve.
  • In a large pot heat the grapeseed oil over medium high heat and then add the onion and ginger.  Sautee until tender but not browned (about 5 min)

Asparagus Stock Base

  • Add the water, bay leaf, thyme, lemon zest and 12g of the sugar.  Bring to a simmer and then immediately remove from heat.

Asparagus Stock Base 2

  • Add the reserved bottoms of the asparagus spears, cover and let steep for 20 minutes to make an asparagus stock.
  • Strain the stock back into the original pot discarding the solids.  Add the asparagus tips and pieces, the remaining 12g of sugar, and the salt.

White Asparagus 1

  • Bring to a simmer and let cook until the asparagus is tender (about 20 min).
  • Remove the asparagus tips from the pot and reserve in a container with just enough stock to cover until ready for final serving preparations.
  • Remove the remaining asparagus pieces and refrigerate until the asparagus risotto is nearly finished.

White Asparagus

  • Strain the stock using a fine mesh sieve.  If making the asparagus risotto immediately, heat to just below a simmer.  Otherwise, cool completely and refrigerate until making the risotto.

 

Strawberry Syrup

  • In a small pot, combine the water, Riesling, sugar, and salt over medium high heat and bring to a simmer.
  • Cook until the liquid is reduced by a third (about 10 min)
  • Add the strawberries and bring the liquid back to a simmer.  Remove from heat, cover and let steep for 20 minutes.

Strawberry Sauce

  • Strain the syrup back into the same pot, discarding the strawberries.  Bring back to a simmer and cook until reduced to 60g (about ¼ cup).
  • If you are making the rhubarb compote immediately leave the syrup in the pot.  Otherwise it can be cooled and refrigerated for 3 days.

 

Rhubarb Compote

  • In a small pot, combine the strawberry syrup (from above) and the verjus.  Bring to a simmer and cook until reduced by half (about 10 min).
  • In a separate dry pan, cook the onion over low heat until it is caramelized (about 10 min).
  • Add the rhubarb and cook until just tender and heated through (about 5 min)
  • Fold in the strawberry mixture, cinnamon, and coriander.  Use immediately or cool and store in the refrigerator until final preparations for up to 5 days.

 

White Asparagus Risotto

  • Bring the reserved asparagus stock to a simmer over medium high heat then lower the temperature to keep it just below a simmer
  • In another pot melt 28g of the butter and the olive oil over medium high heat.
  • Add the onion and sautee until translucent (about 6 min)
  • Add the rice and stir to coat in the fat.  Cook stirring frequently until the rice is toasted and giving off a slightly nutty flavor (about 3 min)

White Asparagus Risotto 1

  • Add the wine, stir, and simmer until it is almost entirely evaporated (about 5 min)
  • Add the asparagus stock one or two ladles full at a time.  Stir after each addition and cook stirring frequently until the liquid is almost evaporated before adding another ladle.

White Asparagus Risotto 2

  • Adjust the heat to keep the risotto at a low simmer and keep adding the ladles of stock until it is all absorbed.
  • Add the cheese and the remaining butter and stir to incorporate thoroughly.
  • Add the remaining asparagus pieces and cook until just warmed through.  Keep warm until ready to plate.

 

Halibut

  • Preheat the immersion circulator to 126°F
  • Make a brine for the fish by stirring the salt and sugar into the cold water until completely dissolved
  • Immerse the fish in the brine and let rest in the refrigerator for 10 min
  • Removed the fish from the brine and pat dry.  Discard the brine.
  • Vacuum seal the fish with the olive oil in individual bags.  This will help with service later as the fish becomes very tender and liable to fall apart.

Sous Vide Halibut 1

  • Cook in the water bath for 15 minutes.

Sous Vide Halibut

 

Final preparations

  • While the asparagus risotto is finishing and the halibut is cooking reheat the other components of the dish
  • Heat the asparagus tips in the reserved liquid on medium low until warmed through
  • Heat the rhubarb compote in a small pot until warmed through.
  • To serve, put a spoonful of the rhubarb compote along the left side of the plate.
  • Remove the fish from the vacuum bag and place halfway on top of the compote.
  • Put a spoonful of the risotto on the top right corner of the plate.
  • Line up the asparagus tips facing the same direction below the risotto.
  • Serve and enjoy

Sous Vide Halibut, White Asparagus Risotto, Strawberry Rhubarb Chutney

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