Take a look at these bad boys:
Onions stuffed with quinoa, spinach, arugula, and feta! I got this recipe from Mark Bittman's How to Cook Everything; the only change I made was to add quinoa for extra protein.
The basic procedure is this: cut the onions in half, put them face down in a dish, drizzle them with butter and white wine, then put them in the oven at 375 degrees for about 15-20 minutes. Meanwhile, cook the quinoa and boil the greens for about 3 minutes. Squeeze the excess water out of the greens. Mix the quinoa, greens and some feta in whatever proportions you want. Take the centers of the onions out, leaving a few layers, and put the stuffing in. Put some panko on top, drizzle some olive oil, and stick them back in the oven for another 20 minutes. Add some bacon bits if you want and you're done!
These were so amazingly good, and filling too (I got pretty full on these two halves). The onions were perfectly sweet. And because of the bacon and feta I didn't need to add any extra salt.