Salad Viking is a Manga/Manhwa/Manhua in english language, MONSTERS series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

Leo, the strongest hunter that came from space to eat up the life from Earth. This strongest monster meets a girl during an investigation. What she recommended to this apex predator was a lower existence vegetable that grows on the ground. And the monster that came from space understands that "the greenery of this planet is delicious."