Preheat oven to 375°F. Spray a baking dish with cooking spray and set aside.
Slice the top off each pepper and remove the insides.
Heat olive oil in a large skillet over medium high. Add ground turkey and cook until browned and no longer pink, stirring frequently to crumble.
Mince garlic and finely chop onion, parsley, and dill. Add all to skillet along with tomatoes, rice, cooked ground turkey, salt, pepper, and water. Stir and bring to a boil. Once boiling reduce heat, cover and simmer until the rice is cooked.
Stuff each pepper 3/4 full with the turkey mixture and place in the prepared baking dish.
Completely cover with foil and bake for 30-40 minutes, until peppers have softened.
Cool slightly, serving with grapes on the side.