To make the optional garnish, heat a grill pan over medium-high heat. Brush a
Lemon Round (1)
Olive Oil (as needed)
, then place it into the pan. Press it down until grill marks form, then flip. Set aside.
Granulated Sugar (1 Tbsp)
into a plate or tray. Rub the rim of a martini glass with lemon and then rim the glass with sugar.
In a shaker, add the
Simple Syrup (1 fl oz)
Lemon Juice (0.5 fl oz)
London Dry Gin (1 fl oz)
. Top with
Ice (as needed)
Replace the lid and shake to chill, 20-30 seconds.
Strain off the drink into the rimmed martini glass. Top with
MARTINI Prosecco (1.5 fl oz)
Garnish with the grilled lemon slice and serve.