This Easy Marinated Tomato Salad is a vibrant, no-fuss way to showcase the beauty of summer tomatoes. Tossed with red onion, garlic, olive oil, vinegar, and lemon juice, the tomatoes soak up a bright, tangy marinade that deepens their flavor. Best of all, it comes together in minutes and tastes even better after resting, making it a perfect make-ahead side for warm-weather meals.