Make the Filling: In a medium bowl, mix cream cheese, bacon, pickled jalapeños, garlic powder, red pepper flakes, Monterey Jack cheese, and 1/2 cup cheddar cheese. Stir until well combined. Shape into 12 heaping tablespoon-sized balls, place on a plate, cover with plastic wrap, and refrigerate until ready to use.
Prepare the Dough: In a food processor, combine bread flour, yeast, salt, and sugar. Pulse to blend. With the machine running, slowly add hot water through the feed tube, just enough to form a smooth dough. Process for 1 minute to knead. Transfer the dough to a greased bowl, turning to coat. Cover loosely with plastic wrap and let rise in a warm spot until doubled in size, about 30-40 minutes.
Assemble the Rolls: Punch down the dough and knead on a lightly floured surface until smooth. Divide into 12 equal pieces. Flatten each piece, place a cream cheese filling ball in the center, and wrap the dough around it, sealing well. Place seam-side down on a floured baking sheet. Using a serrated knife, cut an "X" on top of each roll. Cover with a towel and let rise for about 20 minutes until doubled.
Boil & Bake: Preheat oven to 375°F. Grease a baking sheet and sprinkle with cornmeal. Bring 8 cups of water to a boil in a large saucepan. Add baking soda and sugar. Working in batches, boil 4 rolls at a time for 30 seconds per side. Use a slotted spoon to transfer them to the prepared baking sheet, placing them "X" side up. Brush with egg white, sprinkle with coarse salt, and top each roll with a little cheddar cheese and a jalapeño slice. Bake for about 25 minutes until golden brown. Enjoy warm!