Shepherd’s Pie Soup

Ingredients

• 2 lb russet potatoes, peeled and quartered
• 3/4 tsp salt
• 3 tbsp butter, divided
• 3/4 cup sour cream
• 1 lb lean ground beef
• 1 1/2 cup chopped yellow onion
• 3 cloves garlic, minced
• 1/4 cup flour
• 3 cups chicken broth
• 2 cups half and half
• 3/4 tsp Worcestershire sauce
• 2 tsp Italian seasoning
• 1/2 tsp dry mustard
• 1/4 tsp ground sage
• 1 1/2 cup frozen mixed vegetables
• 2 cups Cheddar cheese, shredded
• salt
• pepper