One of my favorite summer salad combinations is watermelon with feta, balsamic, red onion and arugula. It's so refreshing and light, and perfect to make in jars to take to the beach or park (I keep them chilled in cooler).
4cupsdiced seedless watermelon
1/4small red onion(chopped)
2tbspextra virgin olive oil
fresh black pepper
Divide the dressing equally between 4 pint sized glass jars. Divide and layer the onion, feta, watermelon and finish with 3/4 cup arugula.