Step 1

In large, shallow bowl, whisk together eggs, milk, cinnamon, and vanilla.

Step 2

Working in batches, place 2 bread slices in egg mixture and let soak 2 minutes. Flip and soak 1 minute more (both sides of bread should be totally coated in mixture).

Step 3

Meanwhile, heat 1 tablespoon butter in large nonstick skillet on medium-low. Once melted, add soaked bread and cook until golden brown, 1 to 3 minutes per side; transfer to wire rack. While toast is cooking, soak next batch of challah slices.

Step 4

Repeat with remaining butter and bread. Serve topped with yogurt, berries, and syrup or honey if desired.