I pity you onion haters. The easiest way, bar none, to impress your SO with your cooking skills is to simply have a panful of garlic and onions simmering on the stove when he or she gets home from work. It doesn't matter if you don't have the foggiest idea what you're really going to cook, the onions and garlic just make it smell like you've been working your ass off. Play your cards right and you can actually convince SO to take over the cooking for the evening since you've already made such an auspicious beginning.