Preparation Rinse sweetbreads well, then transfer to a 6-quart pot and add water, vinegar, and salt. Bring to a boil over high heat, then reduce heat and simmer gently 10 minutes. Drain sweetbreads in a colander, then transfer to a bowl of ice and cold water to cool. While sweetbreads are cooling, prepare grill for cooking over direct heat with medium-hot charcoal (moderately high heat for gas; see "Grilling Procedure"). Drain sweetbreads, then pat dry gently and separate into roughly 1 1/2-inch pieces (about 20) using your fingers. Toss sweetbread pieces with oil in a bowl, then thread onto skewers (about 5 pieces on each). Season with salt and pepper. Grill sweetbreads on lightly oiled grill rack (covered only if using a gas grill), turning occasionally, until golden brown, 5 to 7 minutes total. Transfer to a platter and let stand, loosely covered with foil, 5 minutes. Cooks' note:Sweetbreads can be grilled in a hot lightly oiled well-seasoned large (2-burner) ridged grill pan over moderately high heat.
Preparation Rinse sweetbreads well, then transfer to a 6-quart pot and add water, vinegar, and salt. Bring to a boil over high heat, then reduce heat and simmer gently 10 minutes. Drain sweetbreads in a colander, then transfer to a bowl of ice and cold water to cool. While sweetbreads are cooling, prepare grill for cooking over direct heat with medium-hot charcoal (moderately high heat for gas; see "Grilling Procedure"). Drain sweetbreads, then pat dry gently and separate into roughly 1 1/2-inch pieces (about 20) using your fingers. Toss sweetbread pieces with oil in a bowl, then thread onto skewers (about 5 pieces on each). Season with salt and pepper. Grill sweetbreads on lightly oiled grill rack (covered only if using a gas grill), turning occasionally, until golden brown, 5 to 7 minutes total. Transfer to a platter and let stand, loosely covered with foil, 5 minutes. Cooks' note:Sweetbreads can be grilled in a hot lightly oiled well-seasoned large (2-burner) ridged grill pan over moderately high heat.