Put the oats, nuts, seeds, psyllium, and salt in a large bowl bowl and mix.
Whisk the honey, oil, and water together and add it to the mix. Stir well, and transfer to a loaf pan brushed lightly with oil. Pack it in and even out the top.
Cover the pan with a towel and let sit for several hours, at least 2, but you can leave it all day if you want.
When you’re ready to bake, preheat oven to 400 degrees.
Bake for about an hour, until the top browns. Remove from the oven and let cool, completely. This will take several hours.
Once cooled, carefully remove from pan and slice into thin slices. Toast and serve topped with whatever you like.