In a large salad bowl, combine the mixed salad greens, cherry tomatoes, cucumber, bell pepper, red onion, and shredded carrots. Toss gently to mix the vegetables evenly.
In a small bowl, whisk together the olive oil, apple cider vinegar, honey, Dijon mustard, salt, and pepper until well combined.
Drizzle the dressing over the salad and toss gently to coat all the ingredients.
Top the salad with sunflower seeds and crumbled feta cheese.
Serve immediately or chill in the refrigerator for about 15 minutes to allow the flavors to meld.