Preheat oven to 350°F (175°C) and grease a 9-10 inch round baking dish.
In a large bowl, combine oats, pecans, maple syrup, chai spice, and raisins. Add milk, cream, vanilla, and melted butter; stir well. Pour into prepared dish.
Mix cinnamon and sugar; sprinkle evenly over the mixture. Bake for 55-60 minutes until golden and crispy on top.
Remove from oven, serve warm with toppings like milk, cream, or fresh fruit.
Notes
Feel free to add fresh fruit or a drizzle of honey for extra flavor.