Preheat oven to 375F
Cook pasta al dente
In a medium-sized skillet, saute onion and red pepper until tender. Add salt and chili powder
Combine soup, milk, 2 cups shredded cheddar cheese, Parmesan cheese, and onion mixture in a big sized bowl.
Add chicken, cooked pasta, and green chiles. Mix everything well.
Pour mixture into a 9x13” casserole dish. Top with remaining cheddar cheese.
Bake for 30-35 mins until cheese is melted and bubbly.