For milder heat, keep one pepper seeded and remove membranes from both. Prefer more kick? Leave some seeds in or add a pinch of cayenne to the dry mix. If you don’t have a cast-iron skillet, bake in a greased 8- or 9-inch square metal pan; start checking a couple minutes earlier. Leftovers keep covered at room temperature for 1 day or refrigerated up to 4 days; rewarm in a 300°F oven until heated through.