Both can be used, but either will be more relevant depending on the situation ... "With your prime rib and chicken made , you had better hope nobody is a vegetarian." - you can use this when the dish is already finished i.e. already "made", the "making" is finished. "With your prime rib and chicken making , you had better hope nobody is a vegetarian." - this is better used during the cooking (making) process, or, can also be a general statement if the person is often making that particular dish e.g. similar concept to "with your crazy driving, you'd better hope the police don't catch you".

The first sentence is correct: "With your prime rib and chicken made, you had better hope nobody is a vegetarian". This means that the dishes, prime rib and chicken, are now made - or cooked. The second sentence is incorrect, but maybe you want to say that the dishes are not yet made/cooked - you are now making them. You could say: "With your prime rib and chicken in the oven, you had better hope nobody is a vegetarian."

The first one means that the food is already made (because “made” is past tense); the second is a bit awkward (“cooking” would sound more natural than “making”), but means that the food is still in the process of being made (because “making” is progressive tense/aspect).