Quinoa Chicken Enchilada Casserole

Name: Quinoa Chicken Enchilada Casserole
Ingredients: 1 ½ cups water; ¾ cup quinoa; 1 tablespoon extra-virgin olive oil; 2 medium poblano peppers, chopped; 1 jalapeño pepper, finely chopped; ½ medium onion, chopped; 1 tablespoon chili powder; 2 teaspoons ground cumin; ½ teaspoon salt; 2 ½ cups shredded or cubed cooked chicken; 1 (15 ounce) can green or red enchilada sauce, divided; ¾ cup shredded Monterey Jack cheese, divided; Chopped tomato, avocado, scallion and/or cilantro for garnish