Rice with stir fried veggies and tofu or shrimp. You can use the really cheap, tiny salad shrimps to get the flavor without the investment.
I also once did a salad with chicken-fried tofu on top instead of fried chicken. It was utterly delicious and I couldn’t stop filching the tofu bites. I just cut it into about 2 inch rectangles, dredged them in my usual flour/egg/flour (I add milk but you don’t need to) with various herbs and seasonings tossed in with the flour. Then fried them like chicken. I need to make that again soon.
Speaking of which, a Salad Nicoise is beautiful, filling, and cheapish as well. I usually serve it over baby spinach for extra nutrition. And I do a very simple dressing - equal parts EVOO and lemon juice.
I love the baked potato bar idea. Anything that you can just put out the options for saves you time and makes everybody happy. Tacos, fajitas, spaghetti with a couple of sauces . … Do the tomato and dairy avoidance intersect? If not, a marinara and an Alfredo would do 'ya.
Almost any vegetable can be lightly coated with olive oil and the seasonings of your choice, then roasted in the oven. This will always make you look like a genius in the kitchen. Cauliflower is especially good this way. Sometimes I cut it into smaller pieces and layer it over a green lentil dish done with similar spices. (Moroccan, Greek, Italian, curry, just about any profile works well.)
Can people allergic to chicken eat turkey? A marinated turkey breast is a great go-to for large groups. Ask MamaZappa for her recipe.
Does no dairy mean no eggs? If not, a couple of different Frittatas are easy, cheap, quick, and customizable. Beat the eggs gently with some salt and let them sit for about ten minutes before you start. This will prevent them from getting watery or blowing up and then falling flat. A nice potato/ham hash makes a great accompaniment, or just some good bread with olive oil and fresh pepper to dip in. Fresh grated parmesan can be placed beside the serving station in a bowl and really sets it off nicely for those who indulge.
I do a million different combos of green lentils and quinoa. Just boil them in equal amounts, then oil a lasagna pan and make them the bottom layer. It’s a nutritious canvas over which you can spread just about anything. One that goes over nicely is just those two things, mixed with a bag of frozen fire roasted mixed veg and a healthy sprinkle of the nutsonline Syrian Spice Mix. Everything is better with that stuff in it!
OK, that’s enough. Can you tell I love to cook for people? 