Mix the schnapps and cranberry juice in a shaker; pour into an ice-filled glass.
Muddle the jalapeno pepper, lemon and lime slices, tequila, blue curacao and simple syrup (to make a batch, dissolve sugar in equal parts hot water and chill) in the shaker. Slowly strain into the glass over the red layer. Garnish with watermelon, if desired.
Photograph by Kate Sears
Recipe courtesy Guy Fieri for Food Network Magazine