en papillote
US /ˌɑːn pæpɪˈloʊt/
UK /ˌɑːn pæpɪˈloʊt/

1.
en papillote, in papillot
a method of cooking in which food is enclosed in a packet of parchment paper or foil and cooked in the oven, allowing the food to steam in its own juices and flavors
:
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The chef prepared the salmon en papillote with herbs and lemon.
De chef bereidde de zalm en papillote met kruiden en citroen.
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Cooking vegetables en papillote keeps them tender and flavorful.
Groenten en papillote koken houdt ze mals en smaakvol.