I'm looking for some make-ahead ideas for lunch on Monday. Friends are coming from out of town; I've cooked for them for years so they've had all my go-to meals: chicken salad, make-your-own sandwich bar, or muffalettas. I need something that I can make ahead, leave in the frig, and let everybody serve themselves when they get hungry. I will definitely have fruit salad, and maybe some deviled eggs, but I'm blanking on anything interesting for the main course. Any suggestions?