It is possible to find excellent, low-cost food in NYC and 20 Grams Coffee shop in Brooklyn can attest to it with their viral $2.55 cheeseburger. In this episode of Word of Mouth, we speak with owner Young Kim and Executive Director Samantha Casale to understand how this hamburger ended up being NYC's most popular slider. We likewise visit their kitchen where they utilize fresh, seasonal, and local produce to develop the savory sliders that are taking…