Preheat the oven to 350F and lightly grease an 8"-square baking or casserole dish, or a cast iron pan. To cut down on dishes, you can saute the corn in a cast-iron pan and later use it to bake the batter. Saute the corn, bell pepper, and jalapenos in a large skillet for 10-12 minutes, stirring occasionally; the corn should be very lightly browned. Meanwhile, stir together the cornstarch and coconut milk until the cornstarch has mostly dissolved. When the corn and peppers are ready, transfer 2 cups of them to a blender or food processor. Add the coconut milk and cornstartch mixture and pulse about twenty times, until the mixture is mostly pureed but not completely smooth. Transfer to a large mixing bowl and mix with the remaining corn, cornmeal, maple syrup, scallions, cilantro, salt, and cayenne. Pour the batter into a baking dish (or cast-iron pan) and bake for 40 minutes. Let cool for about 10 minutes before serving.