Start by whisking together lemon juice, lemon zest, minced garlic, mayonnaise, and Greek yogurt in a bowl. The mixture should become smooth and creamy, giving off a refreshing aroma. Ensure thorough mixing to avoid clumps.
Slowly pour in the olive oil while continuing to whisk. This helps in achieving a silky dressing. Pour carefully to prevent an oily mess.
Sprinkle in the salt and black pepper, and taste the mixture. The seasoning should enhance the flavors; adjust salt as needed, especially for sodium levels.
Combine the cooked pasta into the creamy dressing, stirring until the pasta is fully coated. Aim for a shiny appearance as the dressing clings to the noodles.
Gently fold in the minced red onion, tuna, and white beans, ensuring the textures and colors blend beautifully. Mix gently to avoid breaking up the tuna and beans.
Stir in the chiffonade of fresh basil last for a burst of flavor and color. Add carefully to maintain the freshness of the basil.
Cover the salad and let it chill in the fridge for about 15 minutes. This allows the flavors to mingle and the salad to cool. Avoid letting it sit too long to prevent flat flavors.