Nonstick cooking spray
3 large poblano chiles, charred, stemmed, seeded, and cut into 2-inch wide by 1/2-inch-thick strips
1 cup frozen corn, thawed
1/2 cup half-and-half
1/2 cup Mexican crema, or creme fraiche
4 Yukon gold potatoes (about 1 pound), unpeeled and cut into 1/8-inch thick rounds
1 teaspoon salt
1/2 teaspoon freshly ground black pepper
3 cup coarsely grated Monterey Jack cheese