Look for salt-free seasonings. Mrs Dash is good & McCormick has a lot of salt-free seasonings like lemon pepper & garlic-herb seasoning.
You can put lemon slices under the skin of the chicken before roasting it, sprinkle the skin w/rosemary.
As for beef, I like my garlic. Rub the roast w/crushed garlic before cooking.
You can bake some potatoes (400 degrees for 50-60 min) and let everyone season their own, or the same w/rice, or add Mrs Dash to the rice before cooking. The worst thing you can do is make one of those premade rice & sauce or noodles & sauce dishes--those things are LOADED w/salt.
And for veggies, salad is always good, let everyone do their own dressing; you can make a good viniagrette from red wine vinegar & olive oil & fresh cracked black pepper. If you're going to serve veggies w/the meal too, DON'T use canned veggies. Even if you rinse them off before boiling them in plain water, they're still saltier than frozen. I don't know what I'd do w/o frozen broccoli & green beans.
Another good thing is a fresh veggie tray.