Step 1

Half the orange, lemon, and lime. Cut one of each half in half again so you have 2 quarters. Juice each quarter into a large pitcher. Add the remains of juiced fruit.

Step 2

Cut the remaining citrus halves into thin slices, then add the slices to the pitcher. Add the peaches and berries.

Step 3

Add the brandy, triple sec, and sugar (if using). With a wooden spoon, muddle to combine and dissolve the sugar.

Step 4

Pour in the wine and stir once more. Chill at least 4 hours or overnight.

Step 5

To serve, fill glasses with ice. Give the white sangria a stir, then pour it over ice. Top with a splash of Prosecco, stir gently once more, and garnish with berries and mint as desired.