Slice the fresh fruit into thin rounds or small chunks, removing any seeds or cores.
In a large pitcher, punch bowl, or carafe, add the sliced fruit and lightly muddle, just so they're open to soaking up the alcohol.
Combine the red wine, brandy, and simple syrup; stir gently to ensure the prepared fruit is coated and the flavors are well distributed.
Refrigerate the mixture for at least two hours (or up to 24 hours), allowing the fruit flavors to infuse the wine.
Just before serving, add orange juice, fresh lemon juice, and seltzer water; give another good stir.
Pour the Sangria into individual glasses filled with ice, ensuring each serving has a generous amount of fruit.
Optional: Garnish with fresh mint leaves, citrus slices, or additional mixed berries.
Serve and enjoy the vibrant and refreshing flavors of your homemade Sangria!
