Start by preheating the oven to 375F while you line an 8x8 baking dish with parchment or grease with oil.
In a medium mixing bowl, add the oats, spices, chia seeds, baking powder and salt and mix well.
To the same bowl whisk in the milk, pumpkin puree, egg, maple syrup, vanilla and olive oil.
Pour the mixture into the parchment lined baking dish and spread around evenly. Top with the chopped walnuts.
Transfer to the oven and bake for 30 minutes or until the walnuts and toasted and browned and the centre of the oats are set. Allow to cool in the pan for 10 minutes before serving.
Enjoy hot with some yogurt, nut butter and a little drizzled maple syrup. Enjoy!