Combine 1/4 cup prunes, Gorgonzola, breadcrumbs and 1/2 teaspoon thyme in a small bowl. Cut a horizontal slit along the thin edge of each chicken breast, nearly through to the opposite side. Stuff each breast with about 2 1/2 tablespoons filling. Use a couple of toothpicks to seal the opening. Season with salt and pepper.

Heat 1 tablespoon oil in a large nonstick skillet over medium-high heat. Add the chicken and cook until golden, about 4 minutes per side. Transfer to a plate.

Add the remaining 1 teaspoon oil, shallot and the remaining 1/2 teaspoon thyme to the pan; cook, stirring, until fragrant, about 1 minute. Add wine and the remaining 1/4 cup prunes. Reduce heat to medium; cook, scraping up any browned bits, until most of the wine evaporates, about 2 minutes. Whisk broth and flour in a small bowl until smooth; add to the pan and cook, stirring, until thickened, about 2 minutes.

Reduce heat to low, return the chicken and any juices to the pan and turn to coat with sauce. Cover and cook until the chicken is cooked through, 3 to 5 minutes more. Remove toothpicks, slice the chicken and top with the sauce.

Note: We like Ian's brand of coarse dry whole-wheat breadcrumbs, labeled "Panko breadcrumbs." Find them in the natural-foods section of large supermarkets. Or, make your own breadcrumbs: Trim crusts from firm sandwich bread. Tear the bread into pieces and process in a food processor until coarse crumbs form. One slice makes about 1/3 cup. Spread the breadcrumbs on a baking sheet and bake at 250 degrees F until dry and crisp, about 15 minutes.

Tip: To select chicken breasts: Our recommended serving size is 4-ounces (uncooked), so look for small breasts. If yours are closer to 5 ounces each, remove the tender (about 1 ounce) from the underside to get the correct portion size. Wrap and freeze the leftover tenders; when you have gathered enough, use them in a stir-fry, for chicken fingers or in soups.