...all the foods you can feed the minions at the Wastelands?

no. This gets asked semi-regularly so I don't think anyone has bothered to make one. You could do this, if you're in it for the long haul?

Me, I have already fed them up to the maximum for Achievements, and I don't think that there IS a limit on what they eat. It seems to be random, but not entirely so. Rarer minions tend to want rarer or more expensive items to eat, and cheaper ones will be less fussy. Unusually for me, I didn't do any statistical analysis on this as the stuck minions change too often to let me pause and write stuff down and this pissed me off. This is just a feeling/guess.

Since your odds of getting a pop are low, around one in seven hundred for most minions it'd be best to just buy a minion if you want them. Otherwise, just stock up on cheapy foods like you might find in Bake Stop, Quick Bites, or the coffee shop. Staff has said that they have increased the odds for a pop but I don't believe this, based on what other users who have fed tons of minions afterwards have said