Pre-heat oven to 425°F. Arrange lemon slices in a thin layer on a large parchment-lined baking sheet. Lightly drizzle with oil (olive or vegetable). Bake for 13-15 minutes, flipping halfway through, until golden, soft, and caramelized. Set aside to cool.
Meanwhile, whisk together lemon juice, olive oil, garlic, and pepper. Toss lettuce, mint, parsley, raisins, pomegranate, pistachios, cucumber, roasted lemons, and dressing. Serve immediately if dressed, or keep dressing separate until ready to serve.
I use romaine lettuce usually, but feel free to switch out with your preferred greens!