Preheat oven to 350°F
Halve pears and use a melon baller or spoon to scrape out the stem, core and seeds, plus a small indent in the center for filling, then cut a tiny sliver off the bottom of the pear to make a flat surface.
Mix all dry ingredients together in a small bowl.
In a separate bowl, whisk together the wet ingredients, then add to the dry and stir together until combined.
Stuff pears with filling and place in a small baking dish.
Mix together water, lemon and syrup and pour on and around pears in the dish.
Cover and bake for 15-30 minutes (approximately 20 minutes for small pears, larger pears may take longer) until fork tender and lightly toasted on top.
Mix yogurt with 1 Tbsp leftover liquid from the pan, adding more to thin if needed.
Serve warm, drizzled with the yogurt sauce and sprinkled with extra cinnamon.