Step 1: 1st step:- take 1 piece of chocolate and roll it into a ball.
Step 2: 2nd step :- roll it properly (try no cracks)
Step 3: 3rd step:- take a knife and make a hole in the middle.(not too deep or wide)
Step 4: 4th step :- put chocolate sauce in that hole.
Step 5: (not too much that it overflows)
Step 6: 5th step :- cover that roll by rolling the ball in your hand.