5 slices of white american bread= 250 g
Put them in a food processor
Powder the mastic gum. Unless you have it in powder... Easier to use. And if you don't have it it is not a problem.
The mastic powdered
In a casserole put the bread crumbs and 650 g double whipping cream + (200 g double cold cream in a container on the side.)
Start to cook while stirring. When it is start to thicken. Add the cold cream bit by bit until it is thick and cooked. I just added the last bit of cream. Let them bubble
The cream is cooked. This is the consistency needed.
Cover with cling film. The film should be placed in contact with the cream so it will not form a crust while cooling. When It Is cold, refrigerate and it will b ready to serve. Or to use.
Put in a recipient