Tomato and Watermelon Salad

INGREDIENTS

• 1 cup 3/4-inch-cubed yellow or red seedless watermelon flesh
• Kosher salt and freshly ground black pepper
• 1/4 teaspoon coriander seed
• 1 small English or regular cucumber, peeled, seeded, and cut into 3/4-inch cubes
• 1 Hass avocado, halved, pitted, peeled, and cut into 3/4-inch cubes
• 1 tablespoon chopped mixed fresh herbs, in any combination: basil, tarragon, chives, and cilantro
• 3 tablespoons extra virgin olive oil
• 3 tablespoons aged balsamic vinegar
• 3 or 4 small to medium heirloom tomatoes, in assorted colors, cored and cut into 3/4-inch chunks