Mix all ingredients except the bread in a large, shallow bowl. Place in the fridge to activate for 10-20 minutes.
Preheat griddle to medium heat (~350 degrees F / 176 C) and grease with 1 Tbsp vegan butter or coconut oil.
Dip each slice of bread in the batter for about 20 seconds on each side (If your batter is too thick, thin with a bit of dairy-free milk). If your bread is dry, leave it in a little longer. If you're using sandwich bread, it should only need 25-30 seconds total to soak.
Place on griddle and cook until golden brown on the underside. Carefully flip and cook until the other side is golden brown as well - 3-4 minutes.