Prep. Preheat oven to 350°F. Grease a standard loaf pan with cooking spray, line bottom with parchment paper, and set aside.
Grate persimmon. Choose ripe but firm Fuyu persimmons—they grate easily and give the best texture. Remove the stem (no need to peel), then grate the fruit on the coarse side of a box grater. Measure out 2 cups, lightly packed, for the recipe.
Combine dry. Whisk together flour, baking powder, baking soda, and salt in a medium bowl and set aside.
Beat eggs. Combine eggs and sugar in large bowl, beat on high with a hand held electric beater for about 3 minutes, until thick and pale in color. Add coconut oil and beat for one more minute.
Finish. Add half of the flour mixture and mix just until combined. Stir in the Greek yogurt, then add the remaining flour mixture, being careful not to overmix. Switch to a rubber spatula and gently fold in the grated persimmon until evenly blended.
Bake. Transfer batter into the prepared loaf pan, smooth top and bake for about 45-50 minutes or until a tooth pick inserted in the middle comes clean. Place pan on a wire rack to cool, slice and enjoy!