My husband and teens must be off the wall, but they can almost kill that size lasagna for the three of them. I would personally make two or serve it with something else.
I agree that it depends on the appetite of your guests. A pan of lasagna would be more than enough for our typical friends but D’s college friends would need a second pan.
If you don’t feel like making a second pan and want to be safe, serve a big salad with lots of veggies and garlic bread.
You can have a charcuterie and cheese platter ahead of time and then a nice dessert to end.
You could always do a pan and a half by using a smaller baking pan for the 1/2.
Lasagne freezes well so there’s that if you have leftovers.
In my ethnic background, if you don’t have at least some leftovers and enough to offer seconds, god forbid someone went home hungry! 
Sorry, didn’t mean to highjack thread. You’ve convinced me we either need to do 2 or go with something else. I hate not having enough food, and I’m a big over-buyer/cooker.
Thanks
Why not one big lasagna and another dish, e.g. manicotti or eggplant parm?
@1214mom - I did the lasagna bolognese recently for a holiday dinner party for 8. I didn’t want to risk it so I made two pans, which was a pain. But being able to freeze the leftovers was nice! You could also make 1 1/2 and use an 8x8 pyrex pan for the extra bit. Or you could probably get away with one pan if you have some appetizers and other side dishes.
Don’t short the main course, if it’s the only one. Some say a 13x9 makes 8 portions of a main. It’s not like cake, where a 2x2 piece is enough. Nor is lasagna like a casserole where you just spoon out a portion.
Allow for someone to want seconds. You’d need to pre-score to get more and those might look small. The idea of a “comfort” dinner includes having enough to be comfortable with the outcome.
Ribs with several different BBQ sauces (Texas, sweet, spicy, Carolina), Brussel sprouts with balsamic, baked beans, and good beer.
I went to my grilled cheese party tonight. It was really fun and the sandwiches were delicious. There were many type of cheese (I went with brie), a lot of different jellies and preserves and a few with jalapeno kick, tomatoes, a couple of caramelized onion and bacon mixes. All were good. There were 2 panini presses (one GF) and they could have used another.
Gumbo
Carnitas with homemade tortillas, rice, cheese, guacamole, lettuce, tomatoes, homemade refried beans
This thread makes me hungry! 
I’m totally copying the grilled cheese party idea.
We have a big family get together every year that got switched to soups a few years ago. It works great, and if there are a few different ones everyone can find something they like. Usually supplemented with mac and cheese and plenty of snacky appetizers. Maybe 2 soups for a group of 8, or even 1 if you don’t have picky eaters.
A pasta buffet might be fun—a few kinds of noodles and different sauces and add ins.
After reading this thread, I thought about making pot roast. But, when I went to the store, I found a better deal on corned beef brisket ( which I usually just make around St. Patrick’s Day). So, I made corned beef and cabbage instead. Potatoes, carrots, onion hit the spot on a cold, rainy day. Also lots of horseradish!
But, I will be on the lookout for meat going on sale to make a nice pot roast. I do enjoy comfort foods like that - also meat loaf , chili , goulash, stroganoff, Swiss steak, stuffed cabbage, stuffed peppers, stew, soup. So many possibilities. Have fun!
@Panhandlegal1 , when you decide what you are going to serve, please let us know! We are invested in this with our eyes and with our stomachs!
Lunchtime. Time to reheat the borscht I made on Sunday - good food to have on hand on this (still!) snowy day.
I forgot about reporting back! Thanks for all the great ideas! I went with beef stew served with garlic bread and green salad. And, chocolate cake for dessert. Everybody had a great time. The beef stew was full of flavor and it was easy–cooked for several hours in the oven.