Preheat oven to 400°F. Grease or line an 8x8 inch baking dish.
In a large mixing bowl, add old fashioned rolled oats, baking powder, cinnamon and salt. Stir until mixed together.
To the bowl, add almond milk, maple syrup, vanilla and peanut butter. Mix until wet ingredients are completely mixed into dry ingredients.
Pour batter into greased baking dish. Dollop jelly onto batter and use a knife to swirl the jelly into the batter.
Bake oatmeal at 400°F for 35-40 minutes, or until the oatmeal is set in the middle.
Allow baked oatmeal to cool for 10 minutes before cutting into four pieces and removing from pan. Top with desired toppings and enjoy!