In a large pot or Dutch oven over medium-high heat, brown the ground beef until about half of it is no longer pink. Season the ground beef with salt and pepper, then add the minced shallot and jalapeño, stirring them into the meat.
Next, stir in the tomato paste and whole-grain mustard until they are evenly coating the beef.
Sprinkle the cornstarch over the contents of the pot. Then stir in the paprika, cumin, and garlic powder.
Add the uncooked pasta to the pot, and then stir in the water. Simmer for 15-20 minutes or until the pasta is al dente.
Reduce the heat to medium-low and stir in the heavy cream, smoked gouda, and cheddar cheese. Stir until the cheeses are melted into the noodles and turned into a creamy sauce.
Stir in the sour cream along with half of the green onions. Serve immediately, topped with more sour cream and green onions to taste. Enjoy!