Do you notice how this is the first time we've been told about a character's thoughts and feelings?
- Rudy likes the sound.
- He likes the pink juice.
We also get a point of view shot when he peeks into the sandwich: we see the bolgna the say way he does, like a pink tongue wagging at him.
"Aren't Estela's instructions an observable fact?"
"Make it thick," Estela had told Rudy. "Three slices of bologna and some cheese."
Good question, and you could argue that case—this is a close call. It certainly doesn't have the clues we talked about before: no judging, no modality, no metaphor.
However, my argument would be that Estela's instructions are a memory. They are not actually happening in this moment, so somebody is filling in the gap for us—either the narrator or Rudy.
Out of all the options, I'd argue for the one in the middle, which is that this is the narrator explaining to us how Rudy got to this situation.