Prepare the Ingredients. Wash and dry the mixed greens and blueberries. Dice the avocado.
Make the Dressing. In a small bowl, whisk together the olive oil, lemon juice, honey, Dijon mustard, salt, and pepper until well combined.
Assemble the Salad. In a large salad bowl, combine the mixed greens, blueberries, feta cheese, sliced almonds, dried cranberries, sunflower seeds, and avocado.
Dress the Salad. Pour the dressing over the salad and toss gently to ensure all the ingredients are evenly coated.
Serve. Serve the salad immediately for the best texture and flavor.