The Best Shepherd's Pie. Ever. is incredibly hearty, with beef and vegetables cooked in a savory gravy, topped with creamy mashed potatoes. The ultimate comfort food!
Preheat oven to 400 degrees. Brown ground beef, onions and garlic in a large skillet over medium-high heat. When meat is completely cooked, sprinkle in flour and continue to saute for 1-2 minutes.
Stir in tomato paste, worcestershire sauce, gluten-free tamari or soy sauce and chicken broth. Simmer for 5-6 minutes, or until sauce is thick. Turn of the heat then stir in frozen vegetables and season with salt and pepper to taste.
Pour beef mixture into a large, oven-proof casserole dish then top with mashed potatoes and sprinkle with garlic salt.
Place casserole dish on a large sheet pan (in case the sauce overflows) then bake for 20-30 minutes, or until top is golden brown. Scoop onto plates then serve.