Stuffed Shells Recipe
Ingredients 1 box (12 ounces) jumbo pasta shells 1 tablespoon extra-virgin olive oil, plus more for drizzling 4 ounces thinly sliced prosciutto, chopped 3 garlic cloves, minced 1 red onion, chopped 1 head radicchio, cored and shredded (4 cups) 1 teaspoon red-wine vinegar 12 ounces fresh ricotta cheese (1 1/4 cups) 8 ounces fresh mozzarella cheese, chilled and cut into small cubes (1 cup) Coarse salt and freshly ground pepper...