Most Extreme Nachos Slideshow

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Extreme Toppings: Tuna Tartare Nachos

Nacho toppings have taken on plenty of extreme themes in recent years — but the addition of raw fish remains a rarity. At Mesa Grill in Las Vegas, however, diners can try out tuna tartare nachos. In addition to uncooked tuna, the dish is completed with three more decidedly extreme ingredients: avocado crema, mango, and habanero hot sauce.