
Preheat the oven to 375°F.
Place the oats, pecans, cinnamon, baking powder, and salt in an oven-safe 8x11-inch baking dish.
In a small mixing bowl, whisk together the egg, milk, ¼ cup maple syrup, and orange zest. Pour it over the oat mixture, then fold in the cranberries. Gently press down to make sure the wet mixture covers all of the oats.
Bake, uncovered, until the mixture sets, about 35–40 minutes. The top of the oatmeal will be golden brown. Remove it from the oven and let it cool for 5 minutes.
Whisk the remaining maple syrup with the Greek yogurt. Serve the cranberry oatmeal bake with a dollop of the maple Greek yogurt.