1. 1. Prepare the Dough Base: In a large mixing bowl, combine the active sourdough starter, all-purpose flour, baking powder, and salt. Gradually add the warm water, starting with 1/4 cup, and mix until a soft, slightly sticky dough forms. You might need a tiny bit more water depending on the consistency of your starter. Knead the dough gently in the bowl for about 1-2 minutes until it comes together. It doesn’t need extensive kneading like bread dough.

2. 2. Preheat and Prep: Preheat your oven to 400 F (200 C). Lightly grease a baking sheet or line it with parchment paper for easy cleanup. This prevents sticking and helps the bottoms crisp up nicely.

3. 3. Shape the Bites: On a lightly floured surface, gently roll out the dough into a rectangle, about 1/4 inch thick. Don’t worry about perfection; rustic shapes are charming! Using a pizza cutter or a knife, cut the dough into approximately 1-inch squares.

4. 4. Assemble the Pizza Bites: Place each dough square onto the prepared baking sheet. Spoon a small amount of pizza sauce onto the center of each square, leaving a small border. Sprinkle a generous pinch of shredded mozzarella cheese over the sauce, followed by a few mini pepperoni pieces.

5. 5. Brush and Season: In a small bowl, whisk together the olive oil and dried oregano. Lightly brush the edges of each dough square with this olive oil mixture. This adds flavor and helps the crust become golden and slightly crispy. If desired, sprinkle a tiny pinch of garlic powder or red pepper flakes over the tops for extra flavor.

6. 6. Bake to Golden Perfection: Transfer the baking sheet to the preheated oven and bake for 15-20 minutes, or until the dough is golden brown around the edges, the cheese is melted and bubbly, and the pepperoni is slightly crispy. Keep an eye on them, as oven temperatures can vary.

7. 7. Cool and Serve: Once baked, carefully remove the pizza bites from the oven. Let them cool on the baking sheet for a few minutes before transferring them to a serving platter. This allows the cheese to set slightly and prevents burns.