In a large bowl, toss together lettuce, sliced onion, blueberries, strawberries, salt, and pepper. Transfer to a serving platter.
Top salad with shredded chicken, pecans, and feta. Drizzle with desired amount of Blueberry BBQ Sauce. Serve immediately. Refrigerate any remaining sauce for up to 1 week.
Blueberry Barbecue Sauce
In a medium skillet, heat oil over medium heat. Add onion and garlic; cook until onions begin to become translucent, 3 to 4 minutes. Add blueberries, lemon juice, white balsamic, and brown sugar. Reduce heat to medium-low and cook until blueberries start to release their juices, about 2 minutes.
Add salt, pepper, chili powder, and smoked paprika. Continue cooking on medium-low, stirring occasionally, until berries are soft and bursting, 8 to 10 minutes more. Remove from heat.
Pour blueberry mixture into a heatproof container. Using an immersion blender, blend mixture until smooth. Let cool completely. Refrigerate until serving, up to 1 week.
Recipe by Taste of the South at https://tasteofthesouthmagazine.com/berry-chicken-salad/