Do you have a slow cooker? Chilli in a SC is fairly easy and you can make it hours before your guests arrive.
I do a chicken pie filling that you could also serve with rice as an alternative to chilli.
1 chicken thigh per person, or one small breast or 1/2 a large breast
leeks
mushrooms
Campbells condensed mushroom soup - I use one for my small slow cooker, my large one would take 3 or 4.
Chop up the chicken, leeks and mushrooms and put im the SC or pan and cook, I've not done it on the hob, you might need to add a bit of water. I'd probably do 1/2 - leek per person and 1-2 portobello mushrooms but you can bulk it out with more or add some tinned sweetcorn.
You could leave out the chicken and add more veg.
Do a big pan of rice and some baked potatoes, do a salad and some grated cheese.
Both the chilli and the chicken can be done the day before and then re heated when guests arrive.
I'd probably just get ice cream for pudding, or make a cheesecake.