Prep Glass: Fill a rock or Old Fashioned glass with ice. Give it a quick stir and set it aside.
Add Agave Syrup: Pour ½ oz agave syrup into the shaker.
Add Lime Juice: Add 1 oz fresh lime juice.
Add Limoncello: Measure and pour ½ oz Limoncello into the shaker as well.
Add Gin: Finally, add 2 oz sage-infused Gin to the mix.
Rim the Glass (optional): Discard the ice inside the Old Fashioned glass. Use a lime slice to slightly wet the rim of the glass and delicately press the edge of the glass into the surface of a plate filled with sugar. Set it aside.
Shake Well: Fill the shaker with ice, close it and give it a good shake (10-15 seconds).
Strain: If any, discard the ice in the Old Fashioned glass and refill it with fresh, new ice cubes (you can also use the cocktail strainer to remove the excess water that has formed at the bottom of the glass and add a few more ice cubes if necessary). Then, use the cocktail strainer to pour the drink into the ice-filled glass.
Garnish: Garnish with a lime slice or twist and serve immediately.