Breakfast casserole

2c rolled oats 
1/3 cup brown sugar
1 teaspoon baking powder
1 teaspoon cinnamon
1/2 teaspoon salt
1 cup walnut pieces
1 cup raspberries {any berries work, I used frozen blueberries}
1/2 cup chocolate chips
2 cups milk
1 egg
40g butter, melted
1 tablespoon vanilla
1 ripe banana, peeled, 1/2-inch slices

In a large bowl, mix together the oats, sugar, baking powder, cinnamon, salt, half the walnuts, half the strawberries and half the chocolate. (Save the other half of strawberries, walnuts and chocolate for the top of the oatmeal).
In another large bowl, whisk together the milk, egg, butter and vanilla.

Add the oat mixture to prepared baking dish. Arrange the remaining strawberries, walnuts and chocolate on top. Add the banana slices to the top then pour the milk mixture over everything. Gently shake the baking dish to help the milk mixture go throughout the oats.
Bake 35 to 40 minutes or until the top is nicely golden brown and the milk mixture has set. For an extra tasty top, sprinkle a tablespoon or so of extra brown sugar (I put some white chocolate chips on top of mine with the banana, naughty!) 

Just like last time I baked with oats, this didn't stick. I ended up freezing it, and cut it from frozen, so it stayed together. Am I using the wrong oats!? I haven't eaten this either, except for when I sliced it- I microwaved it from frozen and it fell apart and I had to eat it with a spoon. It was okay, but not fantastic. Tom likes it, but I'm sure we all know by now that he isn't picky! I'm over baking with oats. Won't be doing it again *sulks*