Cook the ground turkey in a medium skillet coated with cooking spray until cooked through. Drain excess juices from the pan. Place turkey in a bowl and set aside.
Wipe the pan clean with a paper towel. In a small bowl, mix egg whites and skim milk. Scramble mixture in the skillet until egg whites are dry.
Meanwhile, in a small skillet coated with cooking spray, lightly saute tomatoes, spinach, and garlic. Combine with cooked ground turkey and egg whites and mix until evenly distributed and all ingredients are heated through. Season with salt and pepper and serve immediately.