So, I wanted to try Cat/Oven with the Asmor/Cookbook/Ovalchase Daredevil engine, sort of a Grindy Rakdos Food deck built around creating little engine loops that activate every turn. I also decided to run Agatha's Soul Cauldron, as a way to turn my creatures into Asmors if she dies, and also to cheat on Yawgmoth's activated abilities.
So for starters, there's a 2 core deck with some overlap between the cores.
The Cores
4 Asmoranomardicadaistinaculdacar
4 The Underworld Cookbook
4 Ovalchase Daredevil
2 Squee, Goblin Nabob
The interaction between Ovalchase Daredevil and Underworld Cookbook allows you to generate a food a turn, while Asmor tutors cookbooks and also provides you with a payoff for your food. Squee also fuels a single cookbook, and works well with the discard enablers that Asmor necessitates.
4 Cauldron Familiar
4 Witch's Oven
Savour the flavour. This is our other 2 card combo, creating a loop that provides infinite blockers while draining the opponent slowly. The cat is also a good thing to discard to the cookbook, and there's plenty of incidental synergy.
We also have maindeck Agatha's Soul Cauldron for some grave hate that also doubles as a way to get more activated ability usage from our creatures, and even mana cheat a little (sort of).
The Mana
I'm running a bunch of Rakdos Lands, + Oscorp Industries, the Mayhem land that pays us off for discarding it by being playable.
Discard Enablers
With Asmor in the deck, you'll want more discard enablers than just the cookbooks. Faithless Looting is cheap card selection, and there are plenty of lovely things to discard for walue. Fable of the Mirror-Breaker
is like a 3 for 1 or maybe even better that also enables some discard, and combos with our graveyard cards to be true card advantage.
Aristocrats
In addition to the Oven, we have 2 copies of Yawgmoth, Thran Physician to give us some more card advantage/removal on an outlet. Proliferate also plays well with the Soul Cauldron. The goal of this card is to cheat him, and Asmor, under Agatha's Soul Cauldron to abuse their activated abilities even more. If you have to cast him, Protection from Humans is nice upside. Krark-Clan Shaman gives us a tool to wipe boards that have gone out of control, and also combos with Soul Cauldron.
Claim the Firstborn combos with our aristocrats, allowing us to steal an opponent's creature and sac it for walue. You don't need too many copies of this card, as our sac outlets are all forms of removal.
Siding -
This deck's biggest weakness is combo decks, and it's second biggest weakness is sideboard hate, so things will probably get worse games 2 or 3. All of the artifacts and enchantments that hate the grave are very strong against you, (creature ones are as well, but are easier to answer) so Feed the Swarm and cards that destroy/exile artifacts are clutch. Thankfully, instant speed grave hate isn't actually that good against you. However, artifact hate is good against you, including Stony Silence, and so are Hushbringers or Stifles. Additionally, Claim the Firstborn is really bad against big creatures, or decks that don't rely on creatures to win. We also want grave hate in this meta, and answers for swarms, so Rakdos Charm and Feed the Swarm are obvious choices. I decided to run more artifact hate than enchantment hate, as artifact decks and artifact hate pieces are more common than enchantment ones. I opted for Cast into the Fire as my final choice, as being instant speed and potentially helping with the token problem is pretty nice, and so is exiling. Then we're on 2 Blood Moon for Titan and Tron and anybody getting greedy with their mana bases, and 3 Thoughtseize for combo and utility.