The Yolk's on You

The Yolk's on You is an overseer quest and the part of the Food, Glowrious Food multi-stage questline in Fallout Shelter.

Walkthrough
The top floor of the vault has a single radscorpion. Upon heading down the elevator, there are three raiders in the next room. The elevator on the left allows access to the rest of the floors of the vault. The next floor down has a pair of radscorpions. Upon heading down a floor, the left room has a rare dweller that can be recruited to the vault and completes the first objective, and the right room has a pair of mole rats.

The next floor has a pair of raiders on the right, and an elevator that leads up to a previously inaccessible part of the vault. By heading up all the way, one will come to a room with a glowing radroach and two other roaches. By heading down the elevator, the next floor has the raider boss and two additional raiders. Defeat them to complete the optional objective. The left room has a pair of radscorpions.

On the bottom floor, the glowing radscorpion awaits, and it has one other radscorpion to assist it. Defeat it to finish the final objective and gain a lunchbox and a flamer.

Behind the scenes
The name of this quest is pun of phrase, "the jokes on you".