Preheat the oven to 350°F. Line a rimmed baking sheet with parchment paper and set aside.
In a large bowl, combine flaxseed, almond flour, parmesan cheese, baking powder, sweetener, and salt. Whisk well to combine and create a well in the center.
Crack the eggs into a separate bowl, add the oil, and whisk well to combine.
Pour the egg mixture into the flaxseed mixture and mix with a wooden spoon.
Divided dough into 4 rounded bun shapes on the prepared baking sheet. Sprinkle with sesame seeds.
Bake for 18 to 20 minutes or until golden on top. Cool completely on a wire rack.
Notes
Ovens can vary, so keep an eye on the buns to prevent overbaking/burning.
Cool completely before slicing to prevent the buns from collapsing.
Refrigerate for up to a week or six months in the freezer in an airtight container.
Thaw in the microwave at low power or in 30-second increments.