Toast Walnuts : Place 1/2 cup walnuts in a dry skillet over medium heat. Stir frequently until fragrant and lightly golden, about 3–5 minutes. Remove from heat and let cool.
Prepare Dressing : In a small bowl, whisk together 3 tbsp olive oil, 1 tbsp apple cider vinegar, 1 tbsp maple syrup, 1 tsp Dijon mustard, 1/4 tsp salt, and 1/4 tsp black pepper until emulsified.
Prepare Salad Ingredients : Wash and dry 4 cups mixed greens. Thinly slice 2 apples. Crumble 1/4 cup cheese (feta or goat cheese).
Assemble Salad : In a large salad bowl, combine mixed greens, apple slices, toasted walnuts, dried cranberries (if using), and cheese.
Dress Salad: Drizzle maple vinaigrette over the salad and gently toss to coat evenly.
Serve : Transfer to serving plates or serve family-style in the salad bowl.