Whisk the sourdough starter well, it should be like a slightly thicker pancake batter- adjust the flour or water amount to achieve consistency.
Whisk together the starter, yeast and sugar. Let set 1 minute.
Whisk in the oil, baking powder and salt. Stir in the jalapenos, onion and garlic. Stir in the cheeses.
Slowly stir in the flour to a soft dough. Turn out onto a floured surface and knead a few minutes until the dough is no longer sticky and holds its shape.
Divide into 2 loaves and place in buttered loaf pans or in Dutch oven(s) with tinfoil (as shown in video). Let rise in a warm place for about 30 - 40 minutes.
Brush with an egg wash and cook at 375 degrees F for about 35 - 45 minutes and golden brown and firm to the touch or cook outdoors slowly with light coals.
Before serving brush with melted butter. Serve warm or at room temperature.
