Combine first 6 ingredients in a bowl; toss to coat. Cover and refrigerate 1 hour, turning occasionally.
Remove chicken from marinade, reserving marinade; sprinkle chicken with 1/2 teaspoon salt and pepper. Heat oil in a large nonstick skillet coated with cooking spray over medium-high heat until hot. Add chicken; sauté 1 minute per side or until browned. Add reserved marinade, remaining 1/4 teaspoon salt, tomatoes, water, and serrano chile; bring to a boil. Cover, reduce heat, and simmer 1 hour. Discard chile. Top each chicken breast with tomato mixture; serve with Down-Island Salsa, Sautéed Plantains, and rice. Garnish with thyme sprigs and lime wedges, if desired.