Ultimate Shepherd's Pie Recipe with Garlic Mash

Ingredients

• 2 tablespoons olive oil (30 ml)
• 1 large onion, finely chopped (about 1 cup)
• 2 carrots, finely diced (about 1 cup)
• 2 celery stalks, finely diced (about 1 cup)
• 1 pound (450g) ground lamb (or beef, for cottage pie)
• 2 tablespoons all-purpose flour (25g)
• 1 cup (240ml) beef broth (or lamb stock, if you can find it!)
• 1 cup (240ml) red wine (optional, but recommended for depth of flavour)
• 1 tablespoon tomato paste (15ml)
• 1 teaspoon dried thyme
• 1/2 teaspoon dried rosemary
• 1 cup (120g) frozen peas
• Salt and freshly ground black pepper, to taste
• 1 tablespoon Worcestershire sauce
• 3 pounds (1.3 kg) Yukon Gold potatoes, peeled and quartered (or Maris Piper if you're proper British)
• 1/2 cup (120ml) whole milk
• 4 tablespoons (57g) unsalted butter, softened
• 3 cloves garlic, minced
• 1/4 cup (60ml) heavy cream (double cream if you're feeling flush)
• Salt and freshly ground white pepper, to taste (white pepper adds a bit of posh!)
• 1/4 cup grated parmesan cheese (optional, for extra flavour)