In a medium mixing bowl, combine the peanut butter, honey, and salt. Mix until thoroughly combined. Add the sesame seeds, sunflower seeds, coconut, and cashews, and mix to combine. Transfer the mixture onto the prepared sheet pan, working quickly, as the mixture will thicken up rapidly. Use the back of a spoon to press it into the pan and spread into an even layer. Bake for 8-10 minutes, until evenly browned, rotating the pan halfway through the cooking time.