I've often used my favorite chili recipes but substituted tempeh in place of ground beef. It really adds an interesting contrast and it's fantastic.

Another few blogs to try:

101cookbooks.com
sproutedkitchen.com

Very simple dinner: Sautee some garlic and/or onions, empty a can of chickpeas into the lot, add either some chopped tomato or canned diced tomato, some smoked paprika, salt, pepper and maybe a handful or two of spinach. serve over toast or rice. You can also throw a poached egg on top...yum!

i find this vegetarian Majorcan Stew the most delicious thing i have ever tasted - and i'm a carnivore: http://www.epicurious.com/recipes/food/views/Majorcan-Style-Vegetable-and-Bread-Stew-106488

it's a hit every time - with no dairy, no eggs, and no cheese

quick and easy you say?
Fritattas are a sure thing as are most combinations of cheese and bread and a side salad or veggie side. Most side dishes translate well to being enlarged with paneer or tofu cubes (or even lentils) stirred in.
Baked tofu is a good staple: slice a block in half and then cut each into 1/8 in thick squares. Marinate (oo, salt and pepper to teriyaki all work) and bake at 400 to dry out (30-45 minutes--make a big batch and use all week). Something like that is a good toss in to a side dish as described above.

Here are some of my favorite food52 vegetarian recipes. All are simply wonderful:

Rivka's Mujaddara with Spiced Yogurt: http://www.food52.com/recipes/8565_mujaddara_with_spiced_yogurt

Jennifer Perrillo's Summer Farro Salad: http://www.food52.com/recipes/5092_summer_farro_salad

Boulangerie's Summer Presents: http://www.food52.com/recipes/12930_summer_presents

Vrunka's Garden Sweeper Savory Bread Pudding: http://www.food52.com/recipes/11992_garden_sweeper_savory_bread_pudding

ChezSuzanne's Caramelized Butternut Squash Wedges with a Sage Hazelnut Pesto is a perfect fall dish:
http://www.food52.com/recipes/7374_caramelized_butternut_squash_wedges_with_a_sage_hazelnut_pesto

Shakshouka! A hearty, easy, and very adaptable Israeli dish. You saute onions, peppers, tomatoes, and whatever else you feel like until it's good and saucy. Crack a few eggs into the sauce and cook them until the whites are set and the yolks are still runny. Serve with plenty of bread to mop of the sauce and the runny yolks.

Check out the submissions in this week's corn-themed contest. There are dozens of great entries that are vegetarian.

really any stir-fry recipe can be done with tofu or a healthy dose of mushrooms for meatiness (or shrimp, if fish is an option). other easy dishes to have on hand: hummus, eggplant dip (many good recipes for which are on this site), a frittata as mentioned above. deborah madison's vegetarian cooking for everyone is a bible for this kind of cooking, if you're looking to invest in a cookbook.

I live on veggie sandwiches, fried egg sandwiches, bean tacos and hummus wraps. Also things I can make ahead like a pot of beans for beans and rice (eat all week) or bean chili. I also make bean burgers and put the patties in my freezer for quick meals. Egg salad, tofu egg salad, omelets, frittatas etc. Pasta is always quick too.

I find it is easier to make vegetarian meals than meat based, and I eat both. Two places to look: in search recipes on food 52 insert vegetarian and a lot of wonderful recipes will come up. The other is Marcus Samuelsson's site. http://marcussamuelsson.com/ Another possibility is ask your guests to fix their favorite veg. meals for you!