Martha concocts three low-calorie cocktails: a burnt-orange highball, a raspberry-lime gin and tonic, and a watermelon-ginger "mocktail."
Place a small fine strainer over a highball glass. Press raspberries through the strainer into glass; discard solids. Add truvia and lime juice; stir to dissolve. Add ice cubes to glass. Add gin and tonic water; stir to combine. Serve garnished with a lime wedge.