Hello CascadeKitchen. You actually have the ideal set of ingredients to make several timeless, classic gin cocktails that many people prefer over a standard gin and tonic.
The most straightforward and refreshing option for your pantry is a Tom Collins. To prepare one, make a quick simple syrup by dissolving equal parts white sugar and warm water. In a tall glass filled with ice, combine 2 ounces of your London dry gin, 1 ounce of freshly squeezed lemon juice, and 0.75 ounces of simple syrup. Stir gently with a spoon, and then top the glass with roughly 2 to 3 ounces of club soda. It gives you a crisp, effervescent citrus drink without needing any specialized bar tools.
Another classic choice is a fresh Gimlet. In a glass or jar with ice, combine 2 ounces of gin, 0.75 ounces of fresh lime juice, and 0.75 ounces of simple syrup. Stir or shake the mixture thoroughly until it is well-chilled, then strain it into a glass. The balance of sharp lime and botanical gin makes for an elegant, tart cocktail.
If you prefer something dry and unsweetened, you can make a Gin Rickey. Simply pour 2 ounces of gin over ice, squeeze in the juice of half a lime (about 0.5 ounces), and fill the rest of the glass with club soda. It is very brisk and highlights the botanical character of London dry gin nicely.
All of these recipes rely strictly on the lemons, limes, sugar, and club soda you already have at home, so you will not need to make an extra grocery run.