3 pounds watermelon, cut into 1-inch cubes
1 small red onion, thinly sliced
1 1/2 cups arugula
2 cups Romaine cut into bite size pieces
1/3 cup fresh orange juice
2 tablespoons fresh lime juice
2 tablespoons raspberry vinegar
Salt and freshly ground pepper
1/2 cup shredded ricotta salata or parmasean cheese
1 cup coarsely chopped walnuts
2 tablespoons extra-virgin olive oil
1. In a large bowl, toss the watermelon with the red onion. Cover and refrigerate until chilled, about 30 minutes.
2. Add the arugula and romaine to the watermelon. In a small bowl, combine the orange and lime juices and vinegar. Pour the dressing over the salad and season with salt and pepper. Top with the ricotta salata and walnuts; drizzle with the olive oil and serve.