1. Preheat your oven to 375 F (190 C). Lightly grease and flour a 9×5-inch loaf pan, or line it with parchment paper, leaving an overhang on the sides to easily lift the bread out later.

2. In a large mixing bowl, whisk together the all-purpose flour, baking powder, baking soda, and salt. Make sure there are no lumps and the ingredients are well distributed.

3. In a separate medium bowl, combine the plain Greek yogurt, milk, olive oil (or melted butter), and honey or maple syrup (if using). Whisk until everything is smooth and thoroughly combined.

4. Pour the wet ingredient mixture into the dry ingredient bowl. Using a spatula or a wooden spoon, gently mix until just combined. Be careful not to overmix; a few lumps are perfectly fine. The dough will be thick and shaggy.

5. Spoon the dough into your prepared loaf pan, spreading it evenly with the back of your spoon or spatula.

6. Place the loaf pan in the preheated oven and bake for 25-30 minutes. The bread is done when the top is golden brown and a wooden skewer or toothpick inserted into the center comes out clean.

7. Once baked, remove the bread from the oven and let it cool in the pan for about 10 minutes. Then, carefully lift it out using the parchment paper overhang or invert it onto a wire rack to cool completely before slicing.