Yes! Eliminate the slop, and go with a standard pantry of peanut butter, jelly, bologna, processed cheese slices, iceberg lettuce, eggs, white bread, mayo, mustard, milk, and lemon juice (to avoid scurvy...). You can do a lot with those staples: standard cold sandwiches, egg salad sandwiches, deviled eggs, grilled cheese sandwiches, French toast, toast, omelettes, eggs any way, fried bologna, strata, simple salad, bread pudding etc. Then do grocery comps for ground beef, chocolate chips, coffee, salmon, wings, chips, pizza sauce etc.
Slop was a thing, but now they don't show it, and they've allowed so much cheating it isn't anything at all anymore. Put everyone on a standard diet, and make them work for more. That's where you're going to see shifting alliances--someone craving a Snickers bar can be peeled off an alliance if the one side isn't inclined to work for it, but the other side is, and you want that damned candy bar more than you want to suck up to Paul. That is going to get some movement.
Except booze. Cheap beer and wine should be a staple, released in the evenings for social lubrication.
Then BIG competitions for Margarita night with take out tacos, or mai tais with kalua pork, or...champagne brunch. I hate the over-the-top comps for game shit like HoH or Veto where the majority alliance conspires to rule. A food comp, on the other hand, forces them to work together. That leads to different house dynamics.