Step 1: Preheat the Oven

1. Preheat Oven: Preheat your oven to 350°F (175°C). Grease a 9×5-inch loaf pan or line it with parchment paper.

Step 2: Mix Dry Ingredients

1. Combine Dry Ingredients: In a medium bowl, whisk together the all-purpose flour, baking powder, baking soda, and salt. Set aside.

Step 3: Mix Wet Ingredients

1. Combine Wet Ingredients: In a large mixing bowl, whisk together the Greek yogurt, honey (or maple syrup), melted coconut oil (or butter), eggs, lemon zest, lemon juice, and vanilla extract until smooth and well combined.

Step 4: Combine Mixtures

1. Mix Together: Gradually add the dry ingredients to the wet ingredients, stirring gently until just combined. Be careful not to overmix; a few lumps are okay.

Step 5: Bake

1. Pour Batter: Pour the batter into the prepared loaf pan and smooth the top.
2. Bake: Bake in the preheated oven for 50-60 minutes, or until a toothpick inserted into the center comes out clean.

Step 6: Cool and Serve

1. Cool: Allow the loaf to cool in the pan for about 10 minutes, then transfer it to a wire rack to cool completely.
2. Slice and Enjoy: Once cooled, slice the loaf and enjoy it plain or with a light glaze made from powdered sugar and lemon juice if desired.