Broiled Chicken Kebabs with Spicy cashew Sauce

1 cup roasted, unsalted cashews or peanuts, finely ground

3 minced garlic cloves, from

1 head of roasted garlic (see note below)

1 shallot, roasted and minced (see note below)

1 14 1/2 ounce yellow wax beans, including juice

1 14 ounce can coconut milk (found in the Asian section in supermarkets)

1/4 teaspoon cayenne

1/2 teaspoon turmeric

Juice from 1/2 lemon

Salt and freshly ground pepper to taste

3 chicken breasts, cut into 1-inch pieces (6-8 ounces per person)

2 chopped scallions (green part only), for garnish

6 skewers