Rinse 250 grams of strawberries, 150 grams of blueberries, 150 grams of raspberries, and 150 grams of blackberries under cold water.
Hull the strawberries and cut them into halves or quarters, depending on their size.
In a large mixing bowl, combine the strawberries, blueberries, raspberries, and blackberries gently.
Squeeze the juice of 1 lemon over the mixed berries.
Sprinkle 2 tablespoons of powdered sugar over the berries and toss gently to combine.
Let the salad sit for about 10 minutes to allow the flavors to meld together.
Garnish with a few mint leaves before serving.