Pre-heat oven to 350°. Spray the inside of 3 half quart (about 8 fl oz capacity) baking dishes with non-stick cooking spray. Set aside.
In a medium bowl, whisk together oat flour, protein powder, baking powder, and salt until well combined. Set aside.
In another bowl, whisk together milk, eggs, maple syrup, and vanilla extract. Pour into bowl with dry ingredients and mix until completely incorporated and not dry flour remains visible. The batter should be thick and sticky.
Add half the batter to the prepared baking dishes and spread out with a spatula to make an even layer that reaches the edges. Spread strawberry jam on top, but avoid spreading it all the way to the edges of the dish. Top with remaining batter and spread evenly to the edges of the dish.
Bake for 20-22 minutes. They should puff up and begin to brown lightly on top, and touching it should not leave a mark. Set aside on a cooling rack.
While the baked oats cool, make the frosting. Whisk Greek yogurt and powdered sugar together until smooth. Add a touch of red gel food coloring, if desired.
Top cooled oats with frosting and sprinkles (if desired) before serving.