For half a batch of patato gratain you will need:
2.5 deciliters of cream
500 grams of potato (i use waxy, but the basic potato gratain recipies says floury)
half an onion
cloves of garlic to tase
You will also need:
Food grade plasic bags
Vaccuum sealer (optional )
Step 1: Chop and dice
Peel the potatoes. Slice them 3mm thick.
Peel the onion. Slice it 5mm thick in quarters.
Mince the garlic.
Add salt and freshly ground black pepper to the garlic.
Step 3: Seal it
Optionally use a vaccuum sealer.
Mix the ingredients in the bag. Since it is all sealed up there will be no mess at all.
Step 4: Boil it
If you are planning to serve the gratains over a long period of time you put them in the boiling water with an interval.