In a large salad bowl, combine the chopped kale, mixed salad greens, cucumber slices, cherry tomatoes, red onion, shredded carrots, and fresh herbs.
In a small bowl or jar, whisk together the olive oil, balsamic vinegar, Dijon mustard, honey or maple syrup, and a pinch of salt and pepper until well combined.
Pour the dressing over the salad and toss gently to coat all the ingredients evenly.
Sprinkle the crumbled feta cheese (if using) and toasted nuts or seeds over the salad.
Serve immediately as a light and refreshing side dish, or add grilled chicken, tofu, or chickpeas for a more substantial meal.
Enjoy your delicious garden kale salad, straight from your backyard to your table!