Preheat the oven to 400° F and grease a large baking sheet with cooking spray. Place the sliced sweet potatoes in a large mixing bowl and toss with olive oil, salt, and pepper. Arrange the seasoned sweet potatoes in a single layer on the baking sheet with a little room in between each one and bake for 12-15 minutes, until they start to brown around the edges. You might need to work with two baking sheets.
1 large sweet potato*,, cooking spray, 1 tablespoon olive oil, salt and pepper,
Transfer the potatoes to a 12'' cast iron skillet and layer with frozen corn and shredded cheese. Bake for 5-10 minutes, or until the cheese is melted and bubbly.
1/2 cup frozen white corn, 1.5 cups shredded Mexican blend cheese
Remove the skillet from the oven and top with sliced jalapeño, avocado, red onion, and cilantro. Serve immediately.