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1
Preheat the oven to 450 degrees.
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2
Cut 4 sheets of heavy-duty aluminum foil, or 8 sheets of lighter foil, into squares that are 3 inches longer than your fish.
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3
If using lighter foil, make 4 double-thick squares.
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4
Oil the dull side of the foil with olive oil and place a trout, skin side down, on each square.
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5
Season both sides with salt and pepper and open them out flat.
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6
In a bowl combine the tomatoes, garlic, 1 teaspoon olive oil and salt and pepper to taste.
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7
Spoon over the middle of each trout.
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8
Place 1 or 2 sprigs of thyme on top, and fold the two sides of the trout together.
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9
Drizzle 1/2 teaspoon olive oil over each fish.
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10
Making sure that the trout are in the middle of each square, fold the foil up loosely, grab at the edges and crimp together tightly to make a packet.
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11
Place on a baking sheet and bake for 10 to 15 minutes, checking one of the packets after 10 minutes.
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12
The flesh should be opaque and pull apart easily when tested with a fork.
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13
Place each packet on a plate.
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14
Carefully cut across the top to open it, taking care not to let the steam from inside the packet burn you.
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15
Gently remove the fish from the packet and pour the juices over.
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16
Sprinkle with parsley or thyme and serve, passing the lemon wedges.