Prepare Coffee Marinade.
Place lamb in a large glass dish. Pour prepared Coffee Marinade over the lamb and rub in thoroughly on all sides. Refrigerate, covered, for 3 to 4 hours. Remove from marinade and wipe off most (but not all) of coffee mixture with paper towels.
In a large saute pan or skillet over medium heat, saute together the olive oil, mushrooms, and shallots for 4 to 5 minutes. Add red wine, vanilla bean, and mint; bring just to a boil. Reduce heat to a simmer and reduce wine by half. Stir in chicken stock, coffee, and honey until reduce by half. Remove vanilla bean. Stir in cornstarch mixture to thicken sauce if desired. Remove from heat, swirl in butter and season with salt and pepper to taste. Keep warm until ready to serve.
Prepare a hot grill. Cook lamb for 7 to 8 minutes per side or until medium-rare and an internal thermometer registers 125 degrees F. (use a meat thermometer to test for doneness). Remove from grill, cover loosely with aluminum foil, and let rest 5 to 10 minutes before serving. During this time the meat continues to cook (meat temperature will rise 5 to 10 degrees after it is removed from the oven) and the juices redistribute.
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To serve, place lamb rolls or lamb chops on individual serving plates and top with mushroom sauce. Garnish with mint sprigs.
Makes 4 servings.
Coffee Marinade Recipe:
2 teaspoons finely-chopped garlic
1 1/2 tablespoons chopped fresh mint leaves
1 tablespoon finely-ground coffee
1/4 cup olive oil
1/3 cup red wine*
1/4 teaspoon whole mixed peppercorns
1/4 teaspoon cumin seeds
1/4 teaspoon mustards seeds
1/4 teaspoon coriander seeds
2 teaspoons chopped fresh rosemary or 1 teaspoon dried rosemary
1/4 teaspoon coarse or sea salt
* Use the same type of wine that you will be serving to drink with this dish.
To make marinade, combine garlic, mint, coffee, olive oil, and red wine in a small non-reactive mixing bowl.
Using a mortar and pestle (or electric coffee/spice grinder), grind peppercorns, cumin seeds, mustard seeds, coriander seeds, rosemary, and salt. Add to coffee mixture and whisk thoroughly.
Recommended wine: Pinot Noir
Alternative wine: Cabernet Sauvignon