Easy Irish Cottage Pie Recipe

Name: Easy Irish Cottage Pie Recipe
Ingredients: 4 large russet potatoes (peeled and chopped); ½ cup milk; ¼ cup butter; 2 tablespoons olive oil; 1 large onion (diced); 2 large celery stalks (diced); 4 cloves garlic (minced); 1½ pounds ground beef; ½ pound ground lamb; 1 cup frozen peas; 1 cup frozen carrots; 1 can corn ( drained, or 1 cup frozen corn); 2 tablespoons all-purpose flour; 1 cup beef broth; ½ cup red wine; 1 tbsp Worcestershire sauce; 2 tablespoons tomato paste; 1½ teaspoons dried thyme; 1½ teaspoons dried rosemary (crushed); 1¾ teaspoons salt; ½ tsp black pepper; 1 cup cheddar cheese, shredded