I made some oven roasted green beans - just tossed with salt, pepper, and oliv oil and cooked at 450 for about 15 minutes. (You can speed them up with the broiler, but be careful!).
For the omelette, we mix it up based on our mood. There are a couple basic things we always have though.
A cheese! Try the classic - cheddar, or mix it up a bit with some swiss or provolone...or whatever you like!
Veggies. This is where you can play around. I like to throw in some mushrooms, green peppers, spinach, or tomatoes. Some people like to experiment with beans or other veggies too. The important thing is not to overdo it. You don't want a soppy pile in the pan!
To make your omelette perfectly, start by whisking together your eggs really well. Then melt about a tablespoon of butter till it just bubbles. Add the egg and throw on some salt and pepper. Wait till the egg starts to bubble, then add your goodies. Let that cook for about a minute or two. Then comes the tricky part: folding and flipping. I find that the easiest way is to fold both ides up toward the middle, creating a kind of taco effect (rather than the classic fold-in-half method). It makes it easier to flip, and hold all the guts in.
An omelette seems pretty simple, but they're really fun to try new flavors...and to make!