>> time required: 2 hours
>> course: side

Boil @whole milk{750%ml}, @heavy cream{250%ml}, @onion{1} cut in half, @garlic cloves{3}
Turn heat and let steep for ~{10%minutes}
Remove the onion and garlic and add sliced @russet potatoes{2%kg}, @salt{1%tsp}
Boil and then simmer gently for ~{15%minutes}
Add grated @gruyere{100%g} and ground @black peppercorns{0.5%tsp}
Put in 28cm x 20cm baking dish
Cook for ~{50%minutes} at 200°C
Let site at least ~{15%minutes} once out of the oven