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Stir fries are an obvious choice - cook your meat part way, remove it from the pan, clean the pan, do your veggies, remove your roomate's portion, add meat back in (since she is willing to eat chick broth, I can't imagine she'll flip on the same pan being used). Can do the same with curries, pizzas, and the like.

Veggie dishes like lasagne are good as vegetarian dishes even for meat eaters, as are things like mac and cheese, brocolli cheese soup, bean soups, perogies (cook some bacon for the others to go with), chinese dumplings (done with cabbage and tofu if you want), and the like.

Tacos and other mexican foods are also easy to make veggie - make a mix with beans, rice, and spices and veggies for your roomie, then add meat for the carnivores. You could change this up to make burritos or enchiladas.

Look at this as an awesome opportunity to learn more about veggie cooking and perhaps open some doors for your meat-eating friends!

I once had a boyfriend who could not eat salt! I'm glad that's over...

Though I'm not a veggie, I have a lot of friends/relatives who are, as well as kosher vegetarians and halal. It's not really all that challenging, though you do have to keep separate pots and dishes - you might be doing a lot of baking in disposable pans, and serving on disposable plates.

What about frittatas and quiches, mushroom/veggie fajitas, cheese and veggie enchiladas, manicotti (best when made with crepes from scratch), eggplant Parmigana, chili rellenos, Portobello, lettuce and tomato burgers (or Portobello cheeseburgers - marinate the portobellos in balsamic or red vinegar, oil and garlic before broiling or grilling), ratatouille, stuffed shells, spanakopita/spanakatriongas, tyropitas, sag paneer, veggie curries.

This Tortilla and Black-Bean Pie has been a hit when I have vegetarian guests, and it's a great potluck dish too.

http://www.marthastewart.com/recipe/favorite-tortilla-and-black-bean-pie?autonomy_kw=Tortilla%20and%20Black-Bean%20Pie

False Alarm Vegetable Chili is great too:

http://www.marthastewart.com/recipe/false-alarm-vegetable-chili

I haven't tried this yet, but I've been eyeballing it for a while:

Portobello-Shiitake Mushroom Fajitas:

http://topchefs.chef2chef.net/recipes/crescent/#Fajitas

A really fantastic, throw cholesterol and calories to the wind recipe is The Barefoot Contessa Penne With Five Cheeses (I like to make it with tri colori rotini):

http://www.foodnetwork.com/food/recipes/recipe/0,1977,FOOD_9936_32177,00.html

pick up a copy of peter berley's the flexitarian table, it has great meal plans that have a vegetarian and an omnivorous option. really great recipes, my family wouldn't be able to live without it... there are a lot of meats like duck and lamb (very little beef though) and lots of interesting uses for tofu seitan and tempeh

Let them fend for themselves. Everyone in the house is grown up, and should be able to cook for themselves. Being a chosen diet rather then a required one, and it's everyone's home, they can cook for themself.

You'd be surprised how easy it is to accommodate a Veggie. When I lived in CO, lots of people Vegged. One of my close friends in CO (I did her wedding cake) used to say, "Don't go to any trouble, I'm sure there will be plenty to eat!" This made me want to work 2x as hard because she wasn't obnoxious about the fact that she ate differently. There was always a huge array of sides and at least one veggie main when she visited. When I had my little restaurant, I offered tofu in place of all proteins in my entrees. Do you realize Pizza Margherita is a vegetarian dish?

You can construct nice hearty entrees using:

Eggplants (stuffed)
Portobellos (marinara & mozzie - like pizza)
Grilled Veggies offered at BBQs
Stuffed Arties
Starches like pasta and rice
Include beans in your cold salads so as to be more substantial for Veggies (they will not be augmenting their meals with meat)

Recently I read (what I can only classify as) a rant by Alton Brown about vegetarians at the holiday table. I was very surprised to see how unsympathetic he was about special food requirements. He said he feels no obligation to cook anything special if an invited guest declares him or herself a vegetarian, vegan, whatever. I'm in complete disagreement. I would MUCH prefer someone tell me they have likes, dislikes, or special dietary needs before a major meal vs. having someone dissect my food.

Re: the Alton Brown rant; I've got one in response - maybe I'm skewed because I have food allergies, but I think that if you invite people for a meal at your house, then you are obliged to make that meal something they can enjoy. Isn't everyone supposed to have a good time? It's easy enough to add another dish to the menu so that your guests won't feel left out, ignored or snubbed. If you aren't willing to create a situation they can enjoy and fell like they are welcome, then don't invite them - it's just plain rude otherwise.

My first reaction is to say... if she's vegetarian, she should be fine with cooking her own meals... or at least not be horribly offended/insulted when you can't accommodate her....

Even so, lessening the meat in your meals might be a great thing for all of you! It is cheaper, and meat doesnt have to be the centerpiece of your food.
Also, why dont you ask your roommate what she likes to eat? That way, you aren't just... at a loss.

good luck.. have fun!

I wouldn't worry about trying to fix "weird" foods, like eggplant or seitan. I'm a vegetarian in high school and I like to eat the same things as all of my friends. While I do eat lots of soy imitation meat products, I still like stir-fries, pizza, bean tacos, baked potatoes with cheese, pb&j, pastas and raviolis, and pretty much anything else. It's not hard to just avoid meat once you get used to it.

Red beans and rice is the perfect meal to make for a mixed household. You can cook the big pot of beans and vegetables and prepare the rice, and then sizzle up some sausage in a pan on the side. It's vegetarian on its own, but it's easy for anyone who wants sausage to just grab some.

the roommate has 3 choices, eat what you cook, cook for themselves or go hungry. life is simple.

Vegetarian meals can be tasty and easy to make. Who knows, maybe you're new room mate's diet will encourage you to make some changes of your own ;) Did you know that cutting back on saturated fats by 15% - which is equivalent to going meatless just one day a week - reduces your risk of heart disease, cancer, diabetes and stroke?
I work on a non-profit campaign called Meatless Monday which encourages Americans to cut meat from their diet once a week to reduce negative environmental impact and health risks. We have lots of great recipe ideas on our website which will make eating meat-free delicious. Maybe you'll find something that you and your room mate would both enjoy! You can check us out at www.MeatlessMonday.com