Add the cottage cheese to a 4-inch microwave-safe ramekin or wide mug and mash it with a fork until mostly smooth. Whisk in the egg and the melted butter until well combined.
Add the almond flour, baking powder and sea salt. Stir until the batter is smooth with no dry pockets, then tap the ramekin on the counter to level the top.
Microwave on high for 90 seconds, until the bread is puffed and the center feels set and springy. If the center still looks wet, microwave for 10 to 15 seconds more.
Turn the bread out onto a wire rack and let it cool for 2 minutes, then slice it in half horizontally to make 2 rounds.
Melt the 2 tsp butter in a skillet over medium heat. Toast the slices for 1 to 2 minutes per side, until golden and crisp on the outside.