In a large salad bowl, combine the mixed greens, sliced carrot, apple, radishes, and shredded red cabbage.
Sprinkle the toasted seeds on top. If using cheese, add it now.
In a small bowl, whisk together the olive oil, apple cider vinegar, lemon juice, honey (or maple syrup), Dijon mustard, salt, and black pepper until well combined.
Drizzle the dressing over the salad just before serving.
Gently toss the salad so the dressing coats all the ingredients evenly.
Serve immediately while the greens are fresh and crisp.