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1
Preheat the oven to 350 degrees F.
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2
Fold 4 large square sheets of parchment paper in half.
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3
Starting at the fold, cut out a large half heart shape.
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4
Open the paper flat on a surface with the point of the heart towards you.
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5
Butter the centers of each heart lightly with a teaspoon of the butter.
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6
Divide the Swiss chard into 4 portions.
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7
Place a pile onto each heart, centering it on 1 side of the heart, towards the crease.
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8
Top each with 1/4 of the zucchini, asparagus, corn, and mushrooms.
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9
Season the fish well with salt and pepper and place a fillet on top of each pile of vegetables.
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10
Place 1 teaspoon of butter on each fillet and sprinkle each with some of the parsley, tarragon, shallots, and garlic.
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11
Drizzle a little white wine over each.
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12
Fold the paper over to cover the fish.
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13
Starting at the top of the heart, tightly fold over the edges, overlapping each time, all the way to the point, until it is sealed.
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14
Tuck under the last fold to keep it closed.
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15
Butter the tops of the packets with the remaining butter.
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16
Place the packages onto a baking sheet and put them into the oven for 15 minutes.
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17
To serve, put the papillotes onto plates and unfold them at the table.
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18
(Be careful of the hot steam.)
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19
Serve with lemon wedges.