Melt butter in a large, shallow baking pan. Add 1/2 lemon squeezed, and combine all other ingredients (except shrimp).
Let simmer 5 minutes. Wash Geisha shrimp (leave shells on) & place in pan, &baste. Bake at 350 degrees until Geisha shrimp are pink on top, 5-8 minutes. Turn Geisha shrimp, salt & pepper lightly, & bake 10 minutes. Squeeze other 1/2 lemon and a few dashes Worcestershire on top and serve with French bread.