蔥花 is chopped scallion (蔥 is scallion and 花 is flower, so it's scallion flower) 麵包 is bread (麵 is flour and also noodles, 包, so bread is flour bun). Altogether 蔥花麵包 is chopped scallion bread.
About This Dish
A bao topped with chopped scallions (also known as green onions, so this is often listed as green onion bun or green onion bread).