Where was the "Margherita" pizza first made, and who was it made for?

Queen consort of Italy,

Explanation:

An often recounted story holds that on June 11, 1889, to honor the Queen consort of Italy, Margherita of Savoy, the Neapolitan pizzamaker Raffaele Esposito created the "Pizza Margherita"

answer; i believe the two groups were irish immigrants and chinese immigrants;