Lust could be covered by the dish I used for the last couple of aphrodisiac feasts, Meatballs in Oyster Sauce. But I am reluctant to recycle too many dishes, and if we use Cold Spiced Beef, we have the beef dish. I'm thinking of going with a seafood dish for lust. I'm not going to do a serious oyster dish, that's just asking for most of it to come back, so we're talking fish of some sort, I would think. Perhaps fish with a suitably spicy preparation.
For envy, I'm thinking of the use of an apple, on the theory that Satan gave Eve the forbidden fruit, usually represented by an apple, because of envy about the tree of knowledge. But both of the apple dishes I've used before are very time consuming to prepare in quantity: Golden Apples of Meat from "Fabulous Feasts" or Pippin Puddings from "In Service to Our Middles". The first is another meat dish, perfected by Lady Eschiva of Jebala back in the 1990s using pie crust and enormously time-consuming (she got an AoA the night of the feast she prepared 90 of them for). The second is a dessert that is shockingly time-consuming and labor-intensive. The apples have to be cored and filled with custard before cooking. I've done it before for relatively large feasts, but it will suck up a lot of labor during the day of the event.