In a shallow bowl, whisk together the ground flaxseed and vegan milk. Let sit for 5 minutes to thicken.
Add in the granulated sugar, cinnamon, vanilla, salt, and nutmeg. Whisk until combined.
Melt a tablespoon of vegan butter in a non-stick skillet over medium heat.
Dip each piece of bread into the vegan custard mixture for about 5 seconds per side.
Place the soaked bread slices into the skillet in a single layer and toast for 2 to 3 minutes per side until golden brown and crispy. Repeat with the remaining bread.
Serve with fresh berries and maple syrup on top. Enjoy!
Notes
Just like classic French toast, this vegan version turns out best with a thicker bread that is quite dry. Think sourdough or baguette. Prefer a softer interior? Use fresh bread that's slightly toasted instead of day-old bread!
For leftovers and make-ahead, store the cooked vegan egg French toast in an airtight container in the fridge for up to 3 days. Freezing it is not a good idea as the toast might just get soggy. To serve, reheat in the oven at 200°F for 10 minutes.