Meanwhile, for the sauce, in a small saucepan heat remaining 1 tbsp oil over medium-high heat. Add remaining minced shallots; sauté until soft. Add remaining garlic, cook 1 minute. Reduce heat to medium; add remaining 1/4 cup wine, remaining 1/2 cup vinegar, and raspberry preserves. Cook, stirring, 5 minutes or just until thickened. Season with salt and pepper to taste.