01 - Preheat oven to 350°F. Line an 8x4 inch loaf pan with parchment paper.
02 - In a medium bowl, whisk Greek yogurt and eggs until fully combined and slightly frothy.
03 - In a separate small bowl, sift together coconut flour, baking powder, and salt.
04 - Add dry ingredients to wet mixture and mix until smooth. Let batter rest 2-3 minutes for coconut flour to absorb moisture.
05 - If using, stir in apple cider vinegar for extra fluffiness.
06 - Pour batter into prepared loaf pan. Smooth top with spatula. Sprinkle with seeds if desired.
07 - Bake for 30-35 minutes until golden and toothpick inserted into center comes out clean.
08 - Let cool completely in pan, then remove and slice. Serve as toast, sandwiches, or standalone snack.