Brown meat in large frying pan on medium heat with white onion. Add sour cream and cream cheese and heat until combined. Whisk xanthan gum in beef froth and add to frying pan. Stir in Worcestershire sauce and seasoning. Bring sauce to simmer, stirring occasionally. Prepare fettuccine according to package instructions. Pour sauce over fettuccine and gently toss.
Rinse Shirataki noodles in water, and let drain in colander. If not already pre-cut, chop canned artichoke hearts and slice olives. Toss together noodles, artichoke hearts, and olives. Mix vinegar, oil, and spices and pour over salad. Gently stir in grated parmesan cheese. Let the pasta salad sit in a refrigerator at least a couple hours before serving, though it tastes best if it sits over night. The noodles soak in the flavors and get softer with more time. If desired, drizzle a little more oil over the noodles before serving.