Arugula and Romaine Salad with Red Grapes

1 cup water

¼ cup white vinegar

3 tablespoons white sugar

½ cup sliced seedless cucumber

½ cup sliced red onion

¼ head romaine lettuce, chopped

2 cups baby arugula

3 ½ tablespoons olive oil

1 ½ tablespoons balsamic vinegar

salt and ground black pepper to taste

½ cup red seedless grapes, halved

Whisk water, white vinegar, and sugar together in a bowl until sugar has dissolved.

Stir cucumber and onion into the vinegar mixture; cover and refrigerate for 3 hours. Drain vegetables.

Toss romaine lettuce and arugula with olive oil and balsamic vinegar in a large bowl. Season with salt and black pepper.

Divide salad on 2 plates and scatter cucumber mixture and grapes on top to serve.