lots of pancetta plus a little pork — Les Petites Gourmettes

Ingredients

• 4 cups beef broth
• 1 1/2 to 2 pounds pork tenderloin, silver skin removed
• 3-ounce piece pancetta cut into 1/4-inch pieces
• Salt and freshly ground black pepper
• 3 tablespoons olive oil, divided
• 1/4 cup peeled and finely minced shallot
• 2 teaspoons minced fresh rosemary
• 1 garlic clove, peeled and minced
• 3/4 cup dry red wine
• 1/4 cup cherry preserves or jam
• 2 tablespoons unsalted butter, cut into bits