What kind of delicious vegetarian recipes do you know?

I second Moosewood Cookbook. Deborah Madison's The New Vegetarian Cooking for Everyone I treat almost as an encyclopedia - there's an index in the back organized by ingredient which is very helpful if you are trying to cook seasonally! tons of great base recipes too.

I love Cook's Illustrated's Four-Cheese Lasagna. I do believe that they literally just published a vegetarian cookbook; just read about it on their blog (americastestkitchenfeed.com), as they seem to be promoting it at the moment.

Raw food cookbooks are the best vegetarian recipes, in my view. The recipes call for whole foods, not processed and no additives. Easy, fresh and also you can heat if you like.

If you can get past the stigma, the Hare Krishna's make AMAZING vegetarian dishes (Italian, Chinese, Indian, Mexican). Here's a link to the Higher Taste cookbook which you can also pickup for a donation at any Govinda's: http://www.harekrishna.com/col/books/VEG/ht/

This website has a TON of amazing vegetarian recipes - from pasta to grain and legume dishes. Just filter the recipes by "Vegetarian" and you will see all the deliciousness.

I also love Heidi Swanson's 101 Cookbooks blog - http://www.101cookbooks.com/. Her recipes are some of the most delicious and healthy I have ever had. The Chubby Vegetarian is also great - it's vegetarian cooking with a Southern twist - http://chubbyvegetarian.blogspot.com/.

Any cookbooks by Deborah Madison, Martha Rose Shulman, or Yotam Ottolenghi are brimming with vegetarian dishes.

For a quick and delicious vegetarian meal try a tartine - just toast some good bread and throw whatever you love on top. My favorite combos begin with a slice of Ezekiel Bread (or a great artisan loaf) topped with sliced avocado, sea salt, hot sauce and olive oil (sometimes I add a fried egg too) or a simple mix of fresh peanut butter with sliced bananas. Have fun!

If you like to explore older cookbooks, two of my favorites are written by Anna Thomas - The Vegetarian Epicure Books I and II. She has many great recipes that I make to this day, including jams and condiments.

Just happened to make this yesterday, but with some roasted butternut squash I had in the freezer and collards instead of beets and beet greens (though I've made it with those too and it's equally tasty). It's really easy too:

http://food52.com/recipes/21136-rustic-beet-tart-and-wilted-greens

Follow thewimpyvegetarian.com and you will learn a multitude of wonderful ideas.

Since Alice Waters is a hero of mine, her "Chez Panisse Vegetables" is my go to for anything vegetarian. Her ratatouille: https://food52.com/recipes/14155-alice-waters-ratatouille is a perfect perfect side for grilled meats.

I also like to have a few techniques in my back pocket that I don't need recipes for and risotto is one of them. I can throw pretty much any vegetable, steamed, roasted, fried, pureed, etc. in depending on my tastes or the season.

here are a few to start, all with reliable recipes and most with insights into their local or cultural vegetarian cuisine
Julie Sahni, classic Indian vegetable and grain cooking
Madhur Jaffrey, World of the East Vegetarian Cooking (big tour of Asia and 6 or 7 cuisines)
anything by Deborah Madison,
anything by Yotam Ottolenghi & Sami Tamimi
Roger Verge, Vegetables in the French Style
Faith Willinger, Red White & Greens (Italian)
Paola Scaravelli, Cooking from an Italian Garen
anything by Elizabeth Schneider (comprehensive directories of fruits & vegetables, with directions on purchase, storage, cooking. also recipes. like RLB for veg & fruit)
Robertson, Fliners & Ruppenthal, Laurel's Kitchen (has a back to the earth vibe, but good recipes and sound nutrition, 1976 and two or three updated editions)
Katzen's classic, Moosewood Cookbook, 1974 and 40th anniversary editions

I'd better stop.
Enjoy, have fun, learn.

One of the best vegetarian cookbooks I own is the America's Test Kitchen Vegetarian Cookbook. It has a great recipes, example Tamale casserole, Mushroom Bolognese and dips.