Preheat your oven to 350°F (180°C). Line or lightly grease an 8x8-inch baking dish.
In a large bowl, whisk together the eggs. Add the yogurt, honey, and vanilla, then mix until smooth.
Stir together the oats, baking powder, and cinnamon (if using). Add the dry ingredients to the wet ingredients and mix until combined.
Gently fold in the raspberries, being careful not to crush them too much.
Pour the mixture into the prepared baking dish and spread evenly.
Bake for 25 to 30 minutes, or until the center is set and the top is lightly golden.
Let cool for at least 10 minutes before slicing into bars.
