Wash and thoroughly dry all produce. Use a salad spinner for the greens to ensure they're completely dry.
Place the mixed greens in a large salad bowl.
Add the halved cherry tomatoes and sliced cucumber, distributing them evenly throughout the greens.
Scatter the crumbled feta cheese over the vegetables.
Sprinkle the toasted sliced almonds across the salad. If using untoasted almonds, toast them in a dry pan over medium heat for 3-5 minutes until golden and fragrant.
If using optional ingredients like red onion, avocado, dried cranberries, or fresh herbs, add them now.
In a small bowl, whisk together the olive oil, fresh lemon juice, and Dijon mustard (if using) until emulsified.
Drizzle the dressing evenly over the salad.
Season with sea salt and freshly ground black pepper to taste.
Gently toss all ingredients until evenly coated with the dressing.
Let the salad rest for 3-5 minutes before serving to allow flavors to meld.
Serve immediately and enjoy your Salad Supreme!