Easy Shepherd's Pie with Ground Beef - Cook Homey

Ingredients

• 500 g of ground beef (or lamb)
• 1 tablespoon of olive oil
• 2 carrots (grated)
• 1 large yellow onion
• 3 cloves of garlic (crushed)
• 2 tablespoons of tomato puree
• 1 tablespoon Worcestershire sauce
• 2 tablespoons flour
• 300 ml of beef broth
• 1 teaspoon of thyme
• 1/2 teaspoon of rosemary
• 180 g peas (frozen)
• 1 teaspoon of salt
• 1 teaspoon black pepper
• 1 kg of potatoes (Russet or Yukon golds)
• 3 tablespoons of butter (unsalted)
• 80 ml whole milk
• 100 g Parmesan (freshly grated)
• 1 egg yolk
• Salt and pepper to taste