**Prepare the Dressing:** In a small bowl or jar, whisk together olive oil, balsamic vinegar, honey, Dijon mustard, salt, and pepper until well combined. Set aside.
**Assemble the Salad:** In a large salad bowl, combine the mixed greens, sliced strawberries, avocado, red onion, and crumbled cheese (if using).
**Add Nuts:** Sprinkle toasted almonds or pecans over the top for added crunch.
**Toss the Salad:** Drizzle the dressing over the salad and gently toss to coat the ingredients evenly.
**Serve:** Serve immediately as a side dish or light main course.