Watermelon Feta Salad

3 tablespoons olive oil

2 teaspoons white balsamic vinegar

½ teaspoon kosher salt

8 ounces grape tomatoes, halved

3 cups arugula

1 cup sliced red onion

2 pounds watermelon, cubed

4 ounces feta cheese, cut into 1/4-inch cubes

Whisk together the olive oil, vinegar, and salt in a large mixing bowl. Add the tomatoes, arugula, and onions; toss to coat. Gently stir in the watermelon and feta cheese to serve.