In a large bowl, whisk together yogurt, milk, jam, eggs, vanilla & cinnamon. Whisk until well combined.
Dump in bread - mix carefully until all the bread cubes are coated. Next, carefully stir in the berries.
Pour into an 8x8 inch square pan or something of a similar size.
Cover and place in the refrigerator for 4 hours or overnight.
Uncover and bake at 350 degrees for approximately 45 minutes. The tops should be brown, and the liquid should be mostly absorbed.