Tomato, Watermelon & Cucumber Salad with Avocado

What a refreshing salad for summer - rich with varied textures, flavors and colors - people are going to be askign you for this recipe!  I prefer to use various-colored, heirloom tomatoes when in season to heighten the flavors and color here.  You can make this in advance, but I would advise you to keep the dressing separate until just before serving and chop the avocado close to serving as well.

6 tomatoes, cored, seeded and chopped
2 cucumbers, seeded and sliced
4 cups watermelon, cubed
2 avocados, chopped
1/3 cup olive oil
1/3 cup Balsamic vinegar
1/2 tsp ground coriander
1 tbsp chives, chopped
1 tbsp oregano, chopped
1 tbsp. thyme
salt and pepper to taste.

Place chopped vegetables in a large bowl.  In a separate bowl, whisk together olive oil, vinegar, ground coriander, chives, oregano and thyme - season with salt and pepper to taste.  Dress salad and toss to coat - serve immediately.