Preheat oven to 400 degrees. In a small baking dish lay chicken breast, surround chicken with cubed sweet potatoes. Drizzle olive oil over chicken and sweet potatoes. Tear sprigs of rosemary and place in baking dish. Season with salt, pepper and 1/2 tsp of garlic powder.

Bake for 25 minutes at 400 degrees, add grape tomatoes. Return to oven for about 5 more minutes or until tomatoes are splitting and chicken has reach internal temperature of 165 degrees.