Preheat oven to 425°.
Heat oil in a large nonstick skillet over medium heat. Add onion; sauté 5 minutes or until tender. Add bell peppers, 1/4 teaspoon salt, and pepper; sauté 5 minutes. Add 2 cups corn, jalapeño, and cumin; sauté 5 minutes or until peppers are crisp-tender. Remove from heat, and stir in cheese. Spoon about 3/4 cup bell pepper mixture into each of 4 gratin dishes coated with cooking spray.
Combine 3/4 cup corn, 1/2 teaspoon salt, milks, flour, and eggs in a blender; process until smooth. Pour about 1/2 cup egg mixture over vegetables in each dish. Place dishes on a baking sheet. Bake at 425° for 25 minutes or until golden.
Note: This recipe can also be prepared in a 2-quart baking dish. Bake at 425º