Prep the fruit: Hull and slice the strawberries. Roll the lime on the counter, then cut and juice it.

Muddle the base: In a sturdy glass, add 4–5 sliced strawberries, 4–6 basil leaves, and 1–2 teaspoons simple syrup (if using). Gently muddle until the berries release juice and the basil smells fragrant. Don’t pulverize the basil—light pressure is enough.

Add citrus: Squeeze in about 1 tablespoon fresh lime juice. Stir to combine.

Ice and fizz: Fill the glass with ice. Top with chilled sparkling water or club soda, leaving a little room at the top.

Finish and garnish: Give it a quick stir from the bottom to lift the strawberry-basil mixture through the bubbles. Garnish with a strawberry slice and a small basil sprig.

Taste and tweak: Add a splash more citrus for brightness or a touch more syrup for sweetness, if needed.