I just converted my mother, who also doesn't usually like spaghetti squash....she asked for seconds and the recipe!
Problem was, there is no recipe.....I was just winging it. I sauteed some chicken pieces (I cut them up bite-sized before cooking). Removed the chicken when browned, added butter and chopped garlic to the pan, then chopped sundried tomatoes, and (I think?) mushrooms. WHen the mushrooms released their liquid, I added in a little flour, stirred for a minute or two, then deglazed with white wine and added some spices (thyme, I think) and some stock. Simmered until thickened, added the chicken and accumulated juices back in, and finished with some cream...not much, just to give it a richer taste....maybe a 1/4 cup?
Scooped out the spaghetti squash into a serving dish and topped with the creamy chicken and sundried tomato sauce.
Sorry to be so vague, but I think I may have added some cheese, too? I dunno, but a little parm sounds like it would have been good! You could even add parm and breadcrumbs to the top and brown under the broiler.
Really, any creamy sauce would work...a mushroom-based one might hide the texture of the squash really well.
I assume you've tried the traditional marinara, right?
When I'm in doubt, I head to Epicurious.com.....I just checked there and sure enough, there were two recipes under 'chicken and sundried tomatoes' that I've looked at recently....that must have been the inspiration!
ETA: Here's a link to another interesting-sounding Spaghetti squash recipe...stuffed with sausage:
http://www.epicurious.com/recipes/fo...e-Filling-5673