[request] good, easy holiday salad to go with prime rib (maybe quinoa?)

Basically, brother and his family are doing prime rib this year. Between his family and my dad, they got everything covered except a good salad. They said any salad works, but I wanted to try something other than a boring green salad. Budget would be good (poor single guy here) and quinoa is something none of us have tried and sounds interesting..

Needs to feed 8 adults.