Well, the only hint that I can give you is to continue playing and eventually luck will prize you

.
The parrot's head is unlocked once you finish Good Taste (the candy cane is a lv. 4 object, pretty rare), while the most rare salad is the octopus (lv. 5).
Most french players
think that a good way to find rare objects is to
unbalance your fridge avoiding useless rare objects and taking a LOT of lv. 1 and 2 items (the basic ones).
After a while the fridge should be unbalanced with a lot of normal items and you should get the rare ones.
I personally tested this technique but I am not very sure about it

...
Other players think that after you beat Tuber you have a better chance to find rare items (who knows

?).
Just keep on playing and have fun
