Beat eggs and milk together in a large saucepan. Add sugar and cook in a bain marie over medium heat, stirring constantly (do not over heat or you will cook eggs), until thickened about 10 minutes. Mixture should coat the back of a spoon. If making chocolate, melt it in now. Cool mixture completely in a ice bath; then add cream and flavoring, fruit or vanilla. (may be refrigerated overnight at this point). Place in ice cream maker and run for 30 minutes only! Remove ice cream with rubber spatula or wooded spoon, so not to scratch freezer unit