Sheet Pan Chicken Nachos

Name: Sheet Pan Chicken Nachos
Prep time: 20 min
Cook time: 25 min
Total time: 45 min
Yield: 10
Ingredients: For the Chicken:; 2 tablespoons extra-virgin olive oil; 1 small yellow onion, diced; 2 large cloves garlic, roughly chopped; 1 (8-oz) can tomato sauce; 2 tablespoons minced chipotle peppers in adobo sauce, plus 1 tablespoon sauce from can; ¼ teaspoon sugar; 1 teaspoon ground cumin; ½ teaspoon dried oregano; ¼ teaspoon salt; 3 cups shredded cooked chicken, from 1 rotisserie chicken; ¼ cup fresh chopped cilantro (optional); For the Nachos:; 1 (13-oz) bag tortilla chips; 7 cups (28 oz) shredded Mexican blend cheese; ⅔ cup grated pecorino Romano cheese; ¼ cup finely sliced scallions, from 2 to 3 scallions; ¼ cup fresh chopped cilantro; For Serving (Optional):; Guacamole; Sour cream; Limes wedges