1. Follow the instructions to boil South African rock lobster tails. Take out the meat and dice it.
2. Melt margarine or butter. Add seasonings and flour and stir well. Add parsley and mayonnaise and beat well.
3. Separate the rolls, leaving just a small hinge that join the rolls. Toss gently and stuff with hot rock lobster mixture.
4. Apply melted margarine or butter mixture on the top and serve immediately.