Not a Vowelburger, but what is it?

Question

^{Inspired by the original Vowelburger riddle.}
A competitor has appeared to the Vowelburgers restaurant! Can you tell what they're doing?

Patty	???
?	I
?	metal
?	song
?	money

Answer 1

Consonant burgers with vowel buns (O, E).

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I = one
metal = ore
song = ode
money = owe