Prepare the rice: Cook the rice according to the package instructions, then let it cool completely. The rice of the day before is ideal for a better texture.
Prepare the vegetables: wash and cut the cucumber, tomatoes, red onion and red pepper in uniform size.
Assemble the salad: In a large bowl, mix the cooled rice, cucumber, tomatoes, red onion, red pepper, and drained tuna.
Add the feta and basil: crumble the feta on the rice mixture and incorporate the chopped fresh basil.
Add the sauce: pour the mayonnaise and olive oil directly into the bowl. Season with salt and pepper according to your taste, then gently mix to coat all the ingredients.
Serve: For better results, leave the salad in the refrigerator for at least 30 minutes before serving. This allows flavors to mix perfectly.