Preheat the oven to 300F (150C) and line a baking sheet with parchment paper.
Place the almonds in a food processor and pulse 3-4 times for a few seconds until there are fine crumbs mixed with bigger pieces. Remove the mixture into a large mixing bowl. Repeat the process with the walnuts, pumpkin, and sunflower seeds.
Add the chia and sesame seeds to the same mixing bowl and mix everything to combine.
In the small mixing bowl, combine the egg whites, peanut butter, sweetener, salt, vanilla, and protein powder. Pour into the nut and seed mixture and mix well.
Place the mixture onto the baking sheet and spread evenly, pressing with a rubber spatula until one big, even slab is formed. (Bonnie, is to call it a slab even a thing?:)
Bake for 25-30 minutes or until toasty.
Remove from the oven and let it cool completely. Then, break the slab into pieces and top with dehydrated raspberries, strawberries, or coconut flakes, if desired. Serve with full-fat yogurt, cottage cheese, or whole milk.
