In a microwave-safe bowl or 4x4 container, combine the softened butter, almond flour, psyllium husk powder, and baking powder.
Stir until a thick dough forms.
Crack in the eggs and mix thoroughly until the batter is smooth and fully combined.
Microwave on high for 90-100 seconds. The bread will puff up and cook through.
Let the bread cool in the container for 2 minutes, then turn it out onto a cutting board.
Slice it horizontally to create two slices.
Place your cheese slices between the two halves of the bread to assemble the sandwich.
Melt the remaining 1 tbsp (15 ml) of butter in a non-stick skillet over medium heat.
Fry the sandwich for 2-3 minutes per side, until the bread is golden brown and crispy, and the cheese is perfectly melted and gooey.
Remove from the pan, serve immediately, and enjoy!
Cool Before Slicing: Let the bread rest for at least 2 minutes after microwaving. Slicing it while hot can cause it to crumble.