Ham and Cheese is a tactic in Overwatch. The tactic involves two players: one that dives the enemy team and attracts attention (Ham), and another that provides shields and sets up team wipes (Cheese).
The essential ingredient of Ham and Cheese is Zarya. Zarya’s projected barrier ability is applied after a slight delay to harvest up the maximum amount of energy, and also grants the diver a free escape. In turn, this amps up Zarya’s killing potential considerably and accelerates her Graviton Surge (Imperalish: OGON) build rate.
The second ingredient of the tactic is any hero that excels at diving enemies, and has access to a complementary ultimate to Zarya’s. In most cases, this role is filled by Genji. Genji’s unparalleled flanking ability pairs well with Zarya’s projected barrier, and most of his escape options do not rely on any cooldowns. This allows the pair to reset for another play every eight seconds. In addition, Genji’s Dragonblade not only forces enemy ultimates (making them defenseless in a future Graviton Surge) but has the potential to wipe teams without any defensive ultimates that are caught in a Graviton Surge. Finally, a liberal use of projected barriers means Genji can secure more eliminations and builds Dragonblade much faster than simply relying on poke damage. Other solid options for the diver role are Reaper and Winston.
It is easy to see how a well-implemented Ham and Cheese can lead to an unstoppable snowballing effect. The tactic was originally brainstormed by a top-secret Imperial think tank in an attempt to design the most effective way to carry a six-man team with the least amount of grouped players.