New Orleans Style "BBQ" Shrimp

Ingredients:
1 C vegetable oil
2 tsp. garlic, minced
4 bay leaves, crushed
2 tsp. dried rosemary, crushed
1 C salted butter
½ tsp. dried basil
½ tsp. dried oregano
½ tsp. salt
½ tsp. cayenne pepper
1 TBS paprika
¾ tsp. black pepper
1 tsp. fresh lemon juice
2# large fresh shrimp in the shell

Instructions:
In a large roasting pan, melt butter and add oil; mix well. Add remaining ingredients, except shrimp. Cook over medium heat, stirring constantly until sauce begins to boil; careful not to let spices burn. Reduce heat and simmer for 5 minutes, stirring frequently. Remove pan from heat, and let stand uncovered for at least 30 minutes. Return pan to heat and add shrimp, with shells on. Cook over medium heat 6-8 minutes or until shrimp just turn pink. Then, put pan in preheated 450* oven, bake about 10 minutes more. Do not overcook. Serve in shallow bowls with sauce ladled over it, with plenty of fresh, crisp, French baguettes to dip into sauce, and a tossed green salad. Devine!
I started making this in 1975. The original recipe is from "The New Orleans Cookbook".