Shepherd's Pie

Name: Shepherd's Pie
Prep time: 15 min
Cook time: 1 h 15 min
Total time: 1 h 30 min
Cuisine: British
Ingredients: 2 tbsp Olive Oil; 2 Lbs Ground Beef (Ground Lamb for true Shepherd's Pie); 3 tsp Fresh Thyme (chopped (1 1/2 tsp dried)); 2 tsp Fresh Rosemary (chopped (1 tsp dried) ); 2 tsp Kosher Salt; 1 tsp Fresh Ground Pepper; 1 cup Carrots (diced); 1 cup Onions (diced); 1 tbsp Garlic (minced); 1/4 cup Tomato Paste; 1/2 cup Red Wine; 1/2 cup Beef Stock; 2 tsp Worcestershire sauce; Kosher Salt; Fresh Ground Pepper; 1 tsp Corn Starch (if needed to thicken ); 5 Potatoes (Russet or Yukon Gold); 6 tbsp Butter; 3 Egg Yolk; 1/2 cup Parmesan Cheese (in the potato mix ); 1/4 cup Parmesan Cheese (topping)