What is a meal of grilled meats served on large platter in Argentina?

The meal you're thinking of is called an Asado.

Asado is a traditional Argentine barbecue where various cuts of meat, typically beef, are grilled over an open fire and served on a large platter. The meat is often seasoned with salt, pepper, and sometimes herbs, and it's cooked until juicy and tender.

The asado is a social event in Argentina, often enjoyed with family and friends. It's a way of life and a celebration of the country's rich culinary heritage.