Atomic bread in a jar

Russian war-time recipe

I tsp dry yeast
300 ml warm water
230 g whole wheat flour
60 g ground flaxseed
50 g pumpkin seeds
50 g sunflower seeds
50 g sesame seeds
Salt to taste
Mix and let prove for 1 hour
Prepare two wide mouth jars
Remove the rubber seal and brush the inside with vegetable oil
Half fill each of the jars
Let sit for 20 minutes
Coat the surface of the dough with vegetable oil
Place jars on a cool baking rack and place in oven
Bake for 45 minutes at 200c/400f
Immediately replace sterilized seals and close jars
Place in a cool dark place
Can last up to one year