In a bowl, mix both flours, baking powder and the water. Beat with whisk or till smooth and small bubbles form.
Add onion, tomato, salt and seasonings. Mix gently.
In a hot griddle/fry pan (you might want to spray it with a bit of oil first), pour ladlefuls of the mixture. Spread it with a spoon so that tomatoes and onions are not lumped in the center. Let it go lightly brown for a minute or so.
Turn over and let the other side go brown as well. I like this even with tomato sauce and even between slices of vegan bread.
Yummmmm! and full of protein.