Preheat oven to 400°F and line a baking sheet with parchment paper.
In a food processor, add cassava flour, psyllium husk, 4eggs, applesauce, yogurt, baking powder and salt. Process until a smooth dough forms.
With wet hands, divide dough equally into 4 parts [if making buns] OR 8 parts [if making rolls] and place on baking sheet.
Then, form each piece of dough into a dome and let rest for1-2 minutes.
Meanwhile, in a small bowl, crack 1egg and whisk to form an eggwash.
Brush each piece of dough with egg wash and sprinkle with sesame seeds [if using].
Place in oven and bake for 22-25 minutes [for buns] OR 18-20minutes [for rolls], or until golden and cooked through.