Preheat oven to 350 degrees F.
Add all ingredients and blend together using a hand blender or small food processor. Let the batter settle for a few minutes to thicken.
Split the mixture into two and spoon onto oiled parchment paper to make two 3-inch diameter pools of batter. Top with additional seeds if desired.
Bake in preheated oven for 10 minutes.
Use each piece as top and bottom of a burger bun.
While it is baking you can throw your burger on the grill. If you’re lucky the burger will be done by the time the bun is cooked!