reheat grill or grill pan over medium-high heat. Brush pineapple rounds with olive oil and grill until nicely browned on both sides. Set aside to cool, then chop into small bite-sized chunks. Mix pineapple, tomatoes, mangos, jalapeños, onions and lime juice together in a bowl. Season with salt to taste and garnish with cilantro. Serve with chips and enjoy fireside with a refreshing drink!