In a large mixing bowl, combine the mixed greens, artichoke hearts, cherry tomatoes, cucumber, and red onion.

In a separate bowl, whisk together the olive oil, lemon juice, Dijon mustard, minced garlic, salt, and pepper until well combined.

Drizzle the dressing over the salad and toss gently to combine.

Serve immediately, garnished with additional lemon wedges if desired.