In a small sauce pot, heat olive oil over medium-high heat and cook shallots 3-4 minutes. Stir in garlic, ginger and seasonings, and cook 3-4 more minutes, stirring often. Do not let garlic brown. Deglaze with sherry and reduce by half.
Stir in 2 cups of the raspberries, chicken broth and bay leaf and simmer 15-20 minutes, until reduced by half. Stir in mint jelly and cook three minutes more, stirring constantly. Dissolve the cornstarch with the 2 teaspoons of water and stir it into the simmering sauce. Allow the sauce to thicken then remove from the heat and strain. Stir in the vinegar, fresh mint and remaining cup of raspberries.
Serve at room temperature.