Loaded Vegetable Quesadillas

Name: Loaded Vegetable Quesadillas
Ingredients: 2 medium red bell peppers; 8 to 10 tablespoons extra-virgin olive oil; 2 medium zucchini, halved and cut into 1/2-inch half-moons; Kosher salt; 6 scallions, minced; 3 large cloves garlic, thinly sliced; 1 pint cherry tomatoes, halved; 1 to 1/2 teaspoon chili powder; One 15.5-ounce can black beans, drained; 2 tablespoons red wine vinegar; 12 medium corn tortillas; 1 1/2 to 1 3/4 cups shredded Monterey Jack cheese; Sour cream, for serving; 1 fresh cayenne pepper, sliced thin; 1/2 cup fresh cilantro leaves