1. Preheat the oven to 300°F (150°C). Adjust a rack to the lowest position in the oven. Place a piece of parchment paper on a clean part of the countertop.
In a large bowl, mix the chips, sunflower seeds, flaxseeds, flaxseed meal, sesame seeds, almond flour, hemp hearts, psyllium powder, and 1½ teaspoons of salt. Mix the coconut oil and boiling water to form a slightly gelatinous dough ball.
Spread the dough on the prepared parchment paper. Cover it with a second piece of parchment paper and use your hands and a rolling pin to evenly flatten the dough into a 6-inch by 12-inch rectangle.
Slide the dough along with the top and bottom papers onto a baking sheet. Peel off and discard the top layer of parchment paper, then bake the crackers on the parchment paper until they are slightly firm and golden around the edges, about 30 minutes.
Remove the crackers from the oven, use a pizza cutter or knife to slice the giant cracker into 32 squares (1-1/2 inches), then continue baking until they are crispy, another 20 to 25 minutes. Turn off the oven, then let the crackers dry completely inside, 3 hours. Enjoy!