1. Combine Wet Ingredients: In a large mixing bowl, gently whisk together the active sourdough starter, warm water, and honey until well combined. The mixture should look milky and slightly frothy from the starter.

2. Add Dry Ingredients: Stir in the salt, all-purpose flour, and 1/2 cup of rolled oats. Mix with a wooden spoon or a sturdy spatula until no dry streaks of flour remain and a shaggy, sticky dough forms. Do not overmix; just ensure everything is incorporated.

3. First Proof (Bulk Fermentation): Cover the bowl tightly with plastic wrap or a damp kitchen towel. Let the dough rest at room temperature (ideally 70-75 F) for 8-12 hours, or until it has nearly doubled in size and has a bubbly, airy appearance. This is often done overnight.

4. Shape the Loaf: Gently turn the dough out onto a lightly floured surface. Fold the edges of the dough towards the center to create a round or oval shape, building tension on the surface. Avoid deflating the dough too much.

5. Second Proof (Final Rise): Lightly flour a proofing basket (banneton) or a bowl lined with a floured kitchen towel. Carefully transfer the shaped dough, seam-side up, into the basket or bowl. Sprinkle the top with a few extra rolled oats. Cover loosely with plastic wrap and let it proof at room temperature for 2-4 hours, or until visibly puffy. Alternatively, for a deeper flavor, you can cold-proof in the refrigerator for 12-24 hours.

6. Preheat Oven and Dutch Oven: About 30 minutes before baking, place a Dutch oven with its lid into your oven and preheat to 450 F (230 C). Heating the Dutch oven ensures a crisp crust.

7. Bake the Bread: Carefully remove the hot Dutch oven from the oven. Gently invert the dough from the proofing basket into the hot Dutch oven. If desired, score the top of the dough with a sharp knife or razor blade (a simple “X” or a single slash works well). Cover with the lid and bake for 30 minutes.

8. Finish Baking: Remove the lid from the Dutch oven and continue to bake for another 15-25 minutes, or until the crust is deeply golden brown and the internal temperature reaches 200-210 F (93-99 C).

9. Cool Completely: Carefully remove the bread from the Dutch oven and transfer it to a wire rack to cool completely before slicing. This is crucial for the internal structure and flavor development.