I used Parmesan instead of Gruyere in the spinach mixture (rec says either) The flavor was good, but the textures were not great together as the steamed onion got slimy. If anyone else tries this rec you should make certain the spinach mixture is BONE dry before stuffing the onion. The spinach mixture has butter and half/half in it along with chopped steamed onion so it is not easy to dry it out. I steamed the onions to different stages to see what was best- I made 6 onion halves stuffed. The onions that were the right texture were not cooked enough and even with the final baking in the oven they did not finish properly. The onions that were steamed far enough turned slimy and didn't hold up.
I will say the stuffed onion halves were gorgeous on a plate- I topped them (after they came out of the oven) with a tiny slice of cherry tomato just for the color. I served with grilled, marinated pork tenderloin and roasted Kabocha squash. Again, the flavors were great but those darn onions got slimy.
I will say the stuffed onion halves were gorgeous on a plate- I topped them (after they came out of the oven) with a tiny slice of cherry tomato just for the color. I served with grilled, marinated pork tenderloin and roasted Kabocha squash. Again, the flavors were great but those darn onions got slimy.