To make the simple syrup, heat 1 part water and 1 part granulated sugar in a small saucepan until the sugar dissolves. Cool before using. To prepare the green chile juice, put 1 New Mexico green chile in a blender with 1 ounce of water and blend thoroughly. Strain the puree through a fine mesh strainer and transfer to a squeeze bottle. If New Mexico green chiles are not available, serrano chiles may be substituted.