Go Hang a Salami. I'm a Lasagna Hog!

So I've spent part of my morning looking for a lasagna recipe, sort of.

I make pretty good lasagne but I've never made it for 100 people at once. I need to make enough lasagna to feed 100 people, and some of it needs to be vegetarian. None of it can have beef or veal (darn, no veal bones) because Little Miss is off the cow. She doesn't eat beef.

If possible I don't want to make two different sauces. I want to use the same sauce for both versions of lasagne. I know I will cheat and say the sause is vegetarian because , in my opinion, no sauce is complete without a little bit of anchovy. I like the kind that comes in the toothpaste tube.

I guess what I'm looking for is a good lasagne recipe that I can use as a guide so when I make my shopping list I know how much of each ingredient I should plan on buying.

Any help you could give me would be great.