1. Cook macaroni according to package instructions.
2. In a large pot, place oil, jalapeños, garlic, and salt and sauté for five to 10 minutes until vegetables are soft. And milk and mustard and bring to a boil. Add cheese and cornstarch and stir until it forms a smooth, creamy mixture.
3. Add the cooked pasta, and mixed until evenly coated.
4. Serve hot.