Shepherd’s Pie made with ground beef

Ingredients:

• 1 lb ground beef
• 1 onion, chopped
• 2 cloves garlic, minced
• 1 cup frozen peas and carrots
• 1 cup beef broth
• 1 tbsp tomato paste
• 1 tbsp Worcestershire sauce
• 1 tsp dried thyme
• Salt and pepper, to taste
• 4 cups mashed potatoes (homemade or store-bought)
• 1 cup shredded cheddar cheese (optional)