Cheddar Cheese and Lamb Shepherd's Pie

Name: Cheddar Cheese and Lamb Shepherd's Pie
Prep time: 20 min
Cook time: 1 h 30 min
Total time: 1 h 30 min
Yield: 8 portions
Ingredients: 5 oz cheddar cheese; 24 oz lamb meat; 3 ½ oz yellow onions; 1 garlic clove; 7 oz carrots; 1 oz olive oil; 15 oz canned diced tomatoes; 8 oz button mushrooms; 5 oz white wine; 2 tsp salt; ¼ tsp ground black pepper; 1 oz Worcestershire sauce; 35 oz russet potatoes; 5 ½ oz whole milk; 3 oz unsalted butter