This incredibly delicious dish is a mashup of two of our favorite things: chewy, crackly sourdough focaccia and meaty, oozy cheeseburgers! Even better? It's gluten free. Top with your favorite burger toppings and condiments for a showstopping weekend entree.
In a measuring cup, combine warm water, yeast and sugar.
Whisk flour, xanthan gum, salt and baking powder in the bowl of a stand mixer. Make sure it’s thoroughly mixed, then add yeast mixture, starter and egg whites (or alternatives) to the flour mixture.
Add dough hook to mixer and mix well for about 5 minutes, scraping the bowl as needed, making sure the mixture is well blended.
Oil a 10-inch round pan or cast iron skillet. Place dough in the pan. With warm wet hands, form the dough to fit in the pan, pressing your fingers in the dough to make holes. You want a place for the water-oil mixture to sit.
Mix ¼ cup warm water, olive oil and 1 teaspoon salt. Sprinkled half the cheese over the dough and press into the dough holes. Next, pour water mixture over the dough and cover with a towel.
Place in a warm place to proof until doubled in size, 1–2 hours depending on how warm it is. An oven turned off with the light on is a perfect temperature for bread to rise.
Once doubled, preheat oven to 400°F. Make sure to take the dough out of the oven if you used it to proof.
Top doubled dough with cooked ground beef, chopped bacon, the rest of the cheese and the sliced red onion.
Bake for 30–35 minutes, or until the cheese and bread are golden brown. Served with your favorite burger toppings!