Drain and rinse the cannellini beans thoroughly in cold water using a colander, then set aside.
Dice the cucumber into small, even pieces and halve the cherry tomatoes, preparing all your fresh vegetables.
Finely chop the red onion and fresh herbs—parsley and mint—and set them aside for easy mixing.
In a large mixing bowl, combine the drained beans, diced cucumber, halved cherry tomatoes, chopped red onion, parsley, and mint.
Juice the lemon using a lemon squeezer, then pour the fresh lemon juice over the salad, filling the bowl with bright citrus aroma.
Drizzle the olive oil over the mixture, then gently toss everything together with a spoon or spatula until well coated and evenly combined.
Season with salt and freshly cracked black pepper to taste, then give the salad a final gentle toss.
Cover the bowl and let the salad sit in the fridge for at least 30 minutes to allow flavors to meld and herbs to infuse.
Before serving, give the salad a quick toss and taste for seasoning, adjusting salt or lemon if needed to brighten the flavors.
Serve the Mediterranean Bean Salad chilled, ideally with crusty bread or pita on the side for a complete, fresh meal.