Yogurt-Marinated Chicken with Watermelon Salad

In a large zip-top bag, combine yogurt, garlic, 1 1/2 teaspoons salt, and 3/4 teaspoon pepper. Set aside 1/2 cup and refrigerate until ready to serve (or up to 1 day). Add chicken to bag and toss to coat. Refrigerate at least 8 hours (or up to 1 day).

Heat a grill or grill pan to medium-high; clean and lightly oil hot grill. Remove chicken from marinade, scraping off excess. Grill chicken, covered, until cooked through, about 4 minutes per side. Let rest, covered, 10 minutes. Let 2 breasts cool, then wrap in plastic and chill for Tomato Gazpacho with Chicken.

Meanwhile, whisk together oil and vinegar; season with salt and pepper. Arrange watermelon and tomatoes on a platter, drizzle with dressing, and sprinkle with basil, then season with salt and pepper. Serve alongside chicken and yogurt sauce.