Sunny French 75

2 oz Sunny with a Chance of Flowers Rosè, chilled
1 oz Elderflower liqueur
1 oz fresh lemon juice
1 oz seltzer water
2 oz gin or vodka or, if you're trying to keep it low alcohol, try a zero-alcohol gin or vodka
optional: rose petals for garnish
Add elderflower, gin or vodka, and lemon juice to a shaker and shake until combined.
Pour into a cocktail glass and top with Sunny with a Chance of Flowers Rosé and seltzer water. Stir and garnish with rose petals.