This vibrant, bi-level restaurant offers two ways to experience its modern, sophisticated take on Mexican cuisine, each with menus based on natural, organic, and local ingredients where possible. Open for dinner only (book for sunset), the Upstairs specializes in exotic-for-Kauai seasonings: Sautéed black tiger shrimp are served with a sauce of pipián rojo (red squash seeds), while the day’s fresh catch comes rubbed in ancho chili with a serrano cilantro citrus sauce. Order the table-made guacamole ($16) for sheer entertainment value. At lunch and dinner, the indoor/outdoor TR Cantina & Margarita Bar ★★ offers simpler but still delicious dishes, including a trio of guajillo-rubbed grilled fish tacos. For weekend brunch at the Cantina, try the avocado toast with poached eggs and pepitas, or the carnitas hash. Happy hour deals include $6 margaritas and $3 beers.