Ringo Starr has eaten the same simple sandwich for decades — and it only has 2 ingredients

Ringo Starr revealed his go-to sandwich on "The Late Show" — a simple goat cheese on bread, driven by his quirky theory about cow milk molecules.

Ringo Starr revealed his go-to sandwich on "The Late Show" — a simple goat cheese on bread, driven by his quirky theory about cow milk molecules.