Lemon Herb Grilled Shrimp

1 1/2 cups catsup

1/2 cup white vinegar

1/4 large lemon - seeded and --finely minced -- with rind

1 tablespoon gravy mstr or ktchn bouquet

1 teaspoon sugar

1 teaspoon ground coriander

1/2 teaspoon ground cumin seed

1/4 teaspoon ground ginger

1/8 teaspoon paprika

cayenne pepper to taste

2 pounds large shrimp -- (20 -25 count) -

--shelled and deveined

bamboo skewers - soaked in

--water for 30 minutes