Preheat oven to 350ºF. Spray a 1.5 quart casserole dish with cooking spray; set aside.
Mix together quick oats, 2 Tbsp. Truvia, baking powder, cinnamon, and salt in a medium sized bowl, until combined.
Add milk, applesauce, yogurt, egg whites, oil and vanilla into the oat mixture. Stir together to combine.
Pour into prepared dish and bake in preheated oven for 30 minutes, or until toothpick comes out clean. During the last 5 minutes of baking, pull baked oatmeal out and sprinkle the last 1 Tbsp. Truvia Brown Sugar over the top and continue baking for 5 minutes.
Serve with a drizzle of syrup or milk, fruit or yogurt. Enjoy!