Lamb Loin in Puff Pastry

This is a special-occasion show piece: boneless lamb loin coated in a pistachio-chestnut-brandy stuffing, wrapped in golden puff pastry, and served with an elegant red wine reduction perfumed with juniper berries and thyme. Think Beef Wellington’s sophisticated cousin, but with lamb.

The red wine sauce is built in classic French style. Browned shallots, mushrooms, and a small amount of ground lamb become the flavour base, then the red wine and stocks reduce by half before juniper, bay leaf, thyme, and garlic infuse the sauce. Strain out the solids and you have a glossy, concentrated wine reduction with restaurant-level depth.

The nut stuffing is the unusual element. Crushed pistachios, chestnut puree, more ground lamb, and brandy blend into a thick, fragrant paste that gets moulded around each lamb loin before the pastry goes on. It’s what separates this from a standard puff-pastry-wrapped roast.

Pro Tips

• Sear the lamb loins hard in a screaming-hot pan for a minute on each side before stuffing and wrapping. The browning gives flavour the pastry can’t.
• Press the puff pastry seams together firmly. Lamb juices that leak through gaps will turn the pastry soggy and dense.
• Brush the pastry with beaten egg yolk before baking for a deeper golden crust. The recipe doesn’t call for it, but it’s standard for pastry-wrapped meats.
• Use an instant-read thermometer to check doneness: 130°F (54°C) for medium-rare, 140°F (60°C) for medium. Insert through the pastry from the side.

Variations

• Substitute beef tenderloin for the lamb loins to make a more traditional Wellington-style dish.
• Use a duxelles (finely chopped mushrooms cooked dry) in place of the nut stuffing for a more classic French version.
• Pair with mashed potatoes or roasted root vegetables to soak up the rich red wine sauce.