Preheat oven to 375 degrees.
Mix walnuts, oats, cinnamon, nutmeg, cloves, baking powder, and salt in a bowl.
In separate bowl, combine milk, syrup, eggs, oil, and vanilla. Whisk to combine well.
Combine wet ingredients into dry and mix. Add berries and blend gently. Pour entire mixture into a greased 9-inch baking dish.
Bake for ~45 minutes until golden brown. Serve as is or with yogurt.