Chili Macaroni and Cheese

Ingredients

 * kosher salt and black pepper
 * 2 cups (8 ounces) macaroni
 * 2 tablespoons vegetable oil
 * 1 small red onion, minced
 * 3 cloves garlic, minced
 * 1/2 red bell pepper, chopped
 * 8 ounces lean ground beef
 * 2 teaspoons chili powder
 * 1 1/2 teaspoons cumin
 * 1 teaspoon paprika
 * 1/2 teaspoon dried oregano
 * 1 15-ounce can kidney beans, undrained
 * 1 14.5-ounce can diced tomatoes, undrained
 * 2 tablespoons tomato paste
 * 2 tablespoons butter
 * 2 tablespoons all-purpose flour
 * 2 cups milk
 * 4 ounces cream cheese
 * 2 cups shredded sharp Cheddar, plus extra for garnish
 * 1 teaspoon Dijon mustard
 * 1 teaspoon Worcestershire sauce
 * 3 green onions, chopped
 * Corn chips, such as Tostitos Scoops, for serving

Directions

 * 1) Preheat the oven to 400 degrees F. Bring a large pot of water to a boil. Add some salt and then the macaroni. Cook to al dente according to the package directions. Drain and hold until the cheese sauce is ready.
 * 2) Heat the oil in a medium pot over medium heat. Add the red onions and cook, covered, until soft, a couple of minutes. Add the garlic and bell peppers and cook an additional 2 to 5 minutes, being careful not to burn the garlic. Add the ground beef and sprinkle with salt and pepper; cook until browned, stirring to break up the beef into small pieces.
 * 3) Add the chili powder, cumin, paprika and oregano, and cook until the spices are fragrant. Add the beans and their liquid, the tomatoes and their juices, and the tomato paste; simmer for 5 to 10 minutes.
 * 4) In a separate saucepot, melt the butter over low heat. Add the flour and cook, whisking, for 1 minute. Whisk in the milk, raise the heat to high, and bring the mixture to a boil; cook, whisking, until thickened. Removing from the heat and whisk in the cream cheese, Cheddar, mustard, Worcestershire and some salt and pepper.
 * 5) Pour the pasta into the cheese sauce and stir to combine. Mix the chili into the macaroni and cheese.
 * 6) Transfer to a serving bowl and top with additional Cheddar and the green onions. Serve with corn chips.