What food is immortalized by the poem about its musical prowess and ability to make you toot?

The food you're thinking of is beans, specifically baked beans.

This refers to the humorous poem "The Baked Bean Song" which includes the lines:

"Baked beans, baked beans, the musical fruit,

The more you eat, the more you toot."

The poem playfully highlights the potential digestive side effects of consuming baked beans, using humor to make light of the situation.