1- In a large saucepan, melt the butter. Add the broccoli and cook for 3 minutes. Add the corn and chicken. Cook on low heat for a few minutes.
2- In a bowl, mix the olive oil, Dijon mustard, orange juice, a pinch of salt and pepper. Pour the sauce into the saucepan. Cook for 5 minutes over medium heat.
3- Add the pasta to the sauce. Heat for 3 minutes. Add the raclette cheese cubes and mix well.
4- Serve immediately.