I'd probably just cook a big pot of pasta (100-140g of pasta per person depending on the crowd) and a nice sauce. For example Ammatriciana usually is very popular.

All you need is a bunch of diced bacon, some onions, optionally a few cloves of slice garlic, passata / canned tomatoes and salt, pepper and a bit of dried oregano.

You start heating your salted water. At the same time start drying the bacon in some oil (might not be necessary if its a really fatty one) and after it has crisped up a bit, add diced onions, garlic and a bit of salt. When all is softened you add the tomatoes and the seasoning (depending on your tomatoes toy might also need a bit of sugar) and let it simmer until your pasta is ready. Drain it. Add pasta and sauce back into the big pot, give it a good mix and serve.

You can replicate the method with all kinds of pasta sauces (Carbonara, Arrabiatta, etc.).