In a large salad bowl, combine the mixed salad greens, cherry tomatoes, cucumber, bell peppers, shredded carrots, red onion, corn, feta cheese, and sunflower seeds.

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 combine.

Serve immediately or chill in the refrigerator for about 30 minutes to let the flavors meld together.