3 oz of Gin
1/2 oz of dry vermouth
1 oz of Midori melon liqueur (or watermelon liqueur)
1/4 tsp of fresh lemon juice (or Lemon Juice)
Pour all ingredients into a mixing glass half-filled with ice cubes. Stir well. Strain into a chilled cocktail glass. Garnish with a melon ball, and serve.