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Roast Sirloin with a Thyme Crust, with Dauphinoise Potatoes, Asparagus and Green Beans

A true centrepiece dish that combines classic British roasting with elegant French-inspired sides. The sirloin is coated with a fragrant thyme crust, roasted until perfectly tender, and served alongside creamy dauphinoise potatoes, crisp asparagus, and vibrant green beans. Ideal for a Sunday gathering or a special occasion, this recipe balances rich flavours with fresh seasonal produce, making it a memorable meal to share.

INGREDIENTS

Ingredients:

For the Sirloin

  • 1.5 kg boned and rolled sirloin joint
  • 2 tablespoons olive oil
  • 4 cloves garlic, minced
  • 2 tablespoons fresh thyme, chopped
  • 2 tablespoons Dijon mustard
  • Salt and freshly ground black pepper
  • 1 tablespoon honey (optional)

For the Dauphinoise Potatoes

  • 1 kg potatoes, thinly sliced
  • 300 ml double cream
  • 2 garlic cloves, crushed
  • Nutmeg, a pinch
  • 100g grated Gruyère cheese
  • Salt and pepper

For the Asparagus and Green Beans

  • 200g asparagus, trimmed
  • 200g green beans, trimmed
  • Salt and pepper
  • 1 tablespoon olive oil
  • Lemon zest (optional)

 

METHOD

This meal, with its rich flavours and varied textures, is perfect for a special occasion or a Sunday roast. The thyme crust adds a fragrant dimension to the beef, while the creamy Dauphinoise potatoes and crisp vegetables provide a delightful contrast. Enjoy this hearty and elegant meal with family and friends!

Roast Sirloin with Thyme Crust

Method:

  1. Prepare the Sirloin: Preheat your oven to 220°C (fan 200°C, gas mark 7). Season the sirloin with salt and pepper.
  2. Make the Crust: In a bowl, mix the olive oil, garlic, thyme, mustard, and honey (if using) to form a paste.
  3. Apply the Crust: Rub this mixture all over the sirloin.
  4. Roast: Place the sirloin in a roasting tray and cook for 20 minutes. Then reduce the heat to 170°C (fan 150°C, gas mark 3) and continue to roast for about 20 minutes per 500g for medium-rare.
  5. Rest: Allow the sirloin to rest for 20-30 minutes before carving.

Dauphinoise Potatoes

Method:

  1. Preheat Oven: Preheat to 160°C (fan 140°C, gas mark 3).
  2. Layer Potatoes: In a greased baking dish, layer the potato slices, seasoning each layer with salt, pepper, and nutmeg.
  3. Add Cream: Mix the cream with the crushed garlic and pour over the potatoes.
  4. Top with Cheese: Sprinkle Gruyère cheese on top.
  5. Bake: Bake for 1-1.5 hours until golden and tender.

Asparagus and Green Beans

Method:

  1. Boil Water: Bring a pot of salted water to a boil.
  2. Blanch Vegetables: Add asparagus and green beans. Cook for 3-4 minutes until bright and slightly tender.
  3. Ice Bath: Immediately plunge them into ice water to stop cooking.
  4. Sauté: Before serving, quickly sauté in olive oil, season with salt, pepper, and lemon zest.

To Serve

  • Carve the Sirloin: Slice the rested sirloin into thick slices.
  • Plate Up: Serve a slice of sirloin with a portion of Dauphinoise potatoes and a side of the asparagus and green beans.
  • Optional Jus: You can make a simple jus with the pan drippings, some red wine, and beef stock, reduced over heat.

The sirloin joint, especially when boned and rolled, is a prime cut of beef that has long been favoured for its flavour, versatility, and the luxurious dining experience it offers. Understanding its background can enhance appreciation for this exquisite cut:

Origin and Location

  • Anatomy: The sirloin is located between the rib and the rump on the back of the cow, a section known for its tender steak cuts.
  • Characteristics: This area of the cow gets a moderate amount of exercise, balancing marbling (intramuscular fat) with lean meat, which contributes to the sirloin's tenderness and flavour profile.

Cut Variations

  • Sirloin Steak vs Joint: While steaks are individual cuts ideal for grilling or frying, the joint is a larger section, often boned and rolled for roasting.
  • Boning and Rolling: Removing the bone and rolling the cut aids in even cooking and easier carving. It also allows for stuffing or seasoning inside the roll for added flavour.

Culinary Reputation

  • Versatility: Sirloin is well-regarded for its adaptability in various cooking methods - it can be roasted, grilled, broiled, or even slow-cooked.
  • Flavour Profile: Known for its robust beefy flavour, it's a preferred cut for roasts and special occasions.
  • Texture: Offers a fine balance of tenderness and chew, providing a satisfying mouthfeel.

Historical Context

  • British Tradition: Sirloin has a storied history in British cuisine, famously associated with Sunday roasts and festive meals.
  • Royal Anecdote: There's a popular tale of King James I of England knighting a particularly good loin of beef, which is said to have led to the name 'Sir Loin', although this is more myth than fact.

Nutritional Value

  • Protein-Rich: Like most red meats, sirloin is a good source of high-quality protein.
  • Nutrients: It contains various nutrients, including iron, B vitamins (especially B12), and zinc.
  • Dietary Considerations: While nutritious, moderation is key due to its saturated fat content, particularly in diets concerning heart health.
Preparation Time: 10 minutes
Cooking Time: 1hr 30 min