Preheat oven to 350°. In a 10-in. cast-iron or other ovenproof skillet, heat oil over medium heat. Add onion and red pepper; cook and stir until crisp-tender, 6-8 minutes. Remove from skillet; set aside.
In a large bowl, whisk eggs, cream, baking soda, hot pepper sauce and salt. Stir in corn, stuffing, bacon, 1 cup cheese and onion mixture. Transfer to skillet.
Bake, uncovered, 35 minutes. Sprinkle with remaining 1/2 cup cheese. Bake until puffed and golden brown, 5-10 minutes longer. Let stand 10 minutes before serving.