Brown ground beef or ground turkey in large frying pan. Add onion, garlic and broth. Cook on low for about 5 mintues. Add carrots and peas and corn. Cook on low for about 15 minutes, stirring occasionally. While mixture is cooking, make instant mashed potatoes as indicated on box. Place ground beef or ground turkey mixture in Pyrex dish. Spread prepared mashed potatoes on mixture. Place in oven at 375 degrees for 30 to 45 minutes, until mashed potatoes begin to brown. Very yummy, especially on a cold day!