Combine liquid ingredients in a cocktail shaker with cracked ice and shake well. Strain into a chilled cocktail glass and garnish with lemon twist.
Refreshing grapefruit and vermouth make this a perfect summer swig.
Pour Scotch and vermouth into a mixing glass. Top it off with grapefruit juice. Add some ice and stir till chilled. Strain into martini glass and garnish with a twist.