Start by peeling and pitting the ripe mango and avocado. Cut them into bite-sized cubes and place them into a large mixing bowl.

Finely chop the red onion to maximize its flavor and ensure even distribution. Add the diced onion to the bowl with the mango and avocado.

Gently fold in the fresh blueberries, being careful not to crush them.

In a separate small bowl, whisk together the juice of one lime and the olive oil until well combined.

Drizzle the prepared lime dressing over the salad mixture in your large bowl. Season with salt and pepper to taste, enhancing the overall flavors.

For an optional fresh touch, sprinkle chopped mint or cilantro over the top before serving.