Toss a completely refreshing arugula and watermelon salad with cucumber, mint, onion and olive, and top it with spicy grilled shrimp.
Prepare a grill for medium-high heat.
Whisk together the lemon juice, 1/3 cup of the oil and a pinch each of salt and black pepper in a large bowl. Add the arugula, watermelon, cucumber, mint, olives and onion; set aside without tossing.
Toss the shrimp with the remaining 1 tablespoon oil, the red pepper flakes and a pinch each of salt and black pepper in a medium bowl. Grill until just cooked through, 2 to 3 minutes per side.
Toss the salad until well combined and divide between 4 plates. Top with the grilled shrimp.