Put the oats, buckwheat, pumpkin seeds, pecans, and walnuts in a large mixing bowl along with the lemon juice and sea salt. Fill the bowl with water just enough to be able to stir it all together in a sticky mixture. Do not over water because we won't be straining this mixture after it soaks - the more water you put in the more that has to dehydrate out! Cover your bowl with a towel, and leave your mixture to soak on the counter overnight or 8-10 hours. This soaking process decreases the phytic acid in the oats, nuts, and seeds making them digest the best, as well as making more of their nutrients available to absorb.