1. 1. Prepare the Dough Base: In a medium-sized mixing bowl, combine the sourdough discard, all-purpose flour, baking powder, and salt. Mix with a spoon or your hands until a shaggy dough forms.

2. 2. Add Wet Ingredients: Drizzle in the 2 tablespoons of olive oil and 2 tablespoons of water. Continue mixing until the dough comes together. If the dough seems too dry, add water one teaspoon at a time until it forms a cohesive, slightly sticky ball. Avoid overworking the dough.

3. 3. Shape the Flatbread: Lightly flour a clean work surface. Turn the dough out and gently knead it a few times, just enough to bring it together. On a large baking sheet lined with parchment paper, lightly brush with olive oil. Transfer the dough to the center of the baking sheet. Using your fingertips, gently press and stretch the dough into an even rectangle or oval shape, about 1/4 inch thick. The edges can be slightly thicker to create a crust.

4. 4. Pre-bake the Crust (Optional but Recommended): For a crispier crust, you can pre-bake the dough. Preheat your oven to 425 F (220 C). Bake the plain dough for 5-7 minutes, or until it just starts to puff up and turn very lightly golden. This step helps prevent a soggy bottom once toppings are added.

5. 5. Add Toppings: Remove the partially baked crust from the oven (if pre-baking). Spread the pizza sauce evenly over the crust, leaving a small border for the edges. Sprinkle the shredded mozzarella cheese generously over the sauce. If using any additional toppings like pepperoni or vegetables, arrange them over the cheese.

6. 6. Apply Everything Bagel Seasoning: Sprinkle the everything bagel seasoning generously over the entire pizza, including the crust edges. This is where the “everything” magic happens!

7. 7. Final Bake: Return the flatbread pizza to the preheated oven. Bake for another 10-15 minutes, or until the cheese is melted and bubbly, and the crust is golden brown and cooked through. Keep an eye on it to prevent burning.

8. 8. Serve and Enjoy: Carefully remove the pizza from the oven. Let it cool for a few minutes on the baking sheet before transferring it to a cutting board. Slice into squares or wedges and serve warm. The crust should be wonderfully crispy and flavorful.