Cook the rice according to the instructions on the packet, then let it cool down. Rinse, core and dice the bell pepper. Clean and finely chop the spring onions. Peel and core the melon and cut into bite-sized pieces with the mozzarella. Mix everything with the rice. Cut the basil into fine strips (do not chop, otherwise it will turn black).
For the dressing, mix together lemon juice, vinegar, pepper and salt, fold in the olive oil.
Mix the dressing, basil and rice and leave in the refrigerator for at least 1 hour until ready to eat.