Irish Lamb Stew

Ingredients

• Salt and ground pepper
• 3 pounds leg of lamb meat, cut into 1 1/2-inch cubes
• 1/4 cup olive oil
• 1 tablespoon vegetable oil
• 6 celery stalks, chopped
• 2 large leeks, chopped
• 2 large yellow onions, chopped
• 2 cups finely chopped cabbage
• 1/2 teaspoon ground coriander
• 1/2 teaspoon ground thyme
• One 8-ounce can diced tomatoes, with juice
• 2 cups canned beef broth