How to Make It
Combine watermelon and tomatoes in a large bowl. Sprinkle with salt, and toss gently to combine; let stand 10 minutes.
Combine arugula, satsumas, and 1 tablespoon of the oil in a medium bowl, tossing to coat. Add to watermelon mixture, and toss gently to coat. Whisk together mint, vinegar, pepper, and remaining 4 tablespoons oil in a small bowl. Drizzle over watermelon mixture. Sprinkle with goat cheese and toasted pecans, and serve.