The speaker is recovering from some great pain, though the poem never says what it was. All we get is the aftermath: a person sitting in the sun, eating a bit of bread. The smallness of the act is the point. After suffering, even something this plain feels like enough, and the poem lets it stand without explanation.
Then the poem widens. Behind the speaker, people at "the madhouse" are talking, and their conversation is called "savory," the same kind of word you'd use for food. That choice links the bread to the voices, as if the speaker is taking in the sounds of other people the way they take in the meal. The title, "Urban pastoral," adds a twist: instead of a quiet countryside, the peaceful scene sits next to a place of distress.
The mood is calm but a little raw. It feels like relief that hasn't quite let go of what came before, and it suggests that ordinary life, even a strange one, can be comforting.