I have keto-hacked million dollar spaghetti.
Melt butter into shiritaki noodles. Heat sour cream and cream cheese together, stir in buttered noodles. Place creamy noodles into a casserole dish. Pour tomato sauce over(add browned ground beef here if you wish, I did not), cover in a cheddar/mozzarella shredded cheese layer, top with shredded fresh parmesan. Bake at 350* F until heated through and cheese is melted and toasty.!