Preheat oven to 320 ℉.
Put water on to boil.
In a large bowl combine all seeds, oats, and spices, mix.
In a small bowl combine flour and boiling water, mix well. Pour over the seeded mix and stir until everything is well incorporated. Let sit for 10 minutes.
Line a baking tray with parchment paper or a silicon baking sheet, and press mixture into an even layer (as thin as possible without creating gaps). It should fit about a 16x10 inch cookie sheet.
Bake for 30-40 minutes, but check after 25 minutes to make sure they don't over cook. To tell if it's done: crackers should be slightly brown on the edges and bottom, but not too dark, and mostly firm to the touch (they will firm up completely when cooled).
Once out of the oven, let cool completely, then break into pieces.