1. Activate Your Starter: In a large mixing bowl, combine the active gluten-free sourdough starter, warm water, olive oil, and honey (or maple syrup). Whisk these wet ingredients together until they are well combined and the starter is mostly dissolved. The mixture should look slightly milky and bubbly.

2. Combine Dry Ingredients: In a separate medium bowl, whisk together the gluten-free all-purpose flour blend, salt, baking powder, and baking soda. Ensure there are no lumps and all ingredients are evenly distributed. This helps prevent pockets of unmixed leavening agents.

3. Mix Wet and Dry: Gradually add the dry ingredient mixture to the wet ingredient mixture in the large bowl, stirring with a sturdy spoon or spatula until a shaggy dough forms. Continue mixing until all the flour is incorporated and you have a thick, sticky dough. It won’t be like traditional wheat dough; it will be more like a thick batter.

4. Prepare for Proofing: Lightly grease an 8×8-inch or 9×9-inch baking pan with olive oil. Transfer the dough into the prepared pan, using a wet spatula or wet hands to gently spread it evenly into the corners. The dough will be quite sticky, so wetting your tools helps prevent sticking.

5. Proof the Dough: Cover the baking pan loosely with plastic wrap or a clean kitchen towel. Place the pan in a warm spot in your kitchen for 30 to 60 minutes. The dough should visibly puff up and look slightly aerated. If your kitchen is cool, this might take a bit longer.

6. Preheat and Bake: While the dough is proofing, preheat your oven to 375 F (190 C). Once the dough has proofed, remove the cover and place the pan in the preheated oven. Bake for 20-25 minutes, or until the top is golden brown and a wooden skewer inserted into the center comes out clean.

7. Cool and Slice: Once baked, remove the pan from the oven and let the bread cool in the pan for about 10-15 minutes. This allows it to set properly. Then, carefully invert the bread onto a wire rack to cool completely before slicing into squares. Cooling completely ensures a clean cut and better texture.