Sheet Pan Black Bean Quesadilla

Name: Sheet Pan Black Bean Quesadilla
Ingredients: 2 tablespoons extra-virgin olive oil, plus additional for greasing; 2 cups sliced bell peppers; 1 medium red onion, thinly sliced; 1 cup charred frozen corn, thawed; 2 cloves garlic, minced; 1 tablespoon chili powder; 1 teaspoon ground cumin; Kosher salt and freshly ground black pepper; Eight to ten 10-inch flour tortillas; One 15-ounce can black beans, drained and rinsed; 2 cups low-fat Mexican shredded cheese; 3 scallions, thinly sliced; 1/2 cup pico de gallo; 1/2 cup sour cream