In a blender or food processor, pulse the old fahioned oats until they are a fine, flour like consistency. (You could also use oat flour!)
Add salt, baking powder, milk, eggs, and vanilla extract. Pulse in the blender until combined (doesn't have to be super smooth, you can leave some it a little thick/chunky.
Add half the batter to prepared baking dish and spread it out with a spatula.
Pour the strawberry jam on top, and carefully spread it out leaving an edge of the oats visible. Top with remaining batter and spread evenly.
Bake for 20-25 minutes until the oats are golden brown on the edges. Allow the oats to cool for 5 minutes before slicing.
Optional - Make the frosting: Whisk the powdered sugar, milk, and vanilla together until smooth.
Spread the frosting on top of the cooled oats and top with colorful sprinkles (if desired).
Notes
Helpful Tips:
Process the oats into a very fine powder. In a food processor pulse the oats until they are a fine, flour-like consistency.
Spread the first layer evenly in the pan before adding jam. -Add half of the batter to your prepared baking dish and spread it out with a spatula. Then, pour the jam over the top, and spread it out.
Avoid over baking. After 20 to 25 minutes, you'll notice that the blended baked oats are golden brown on the edges. At that point, remove the pan from the oven.
Allow the oats to cool for 5 minutes before slicing.