Ingredients

• 4 (6-ounce) cod fillets (or other mild white-fleshed fish)
• 2 medium zucchini, sliced into thin rounds
• 2 medium yellow summer squash, sliced into thin rounds
• 1 medium red onion, thinly sliced
• Kosher salt and freshly ground black pepper
• Crushed red pepper flakes, for sprinkling
• 2 tablespoons extra-virgin olive oil
• 2 tablespoons dry white wine
• 1 lemon, thinly sliced
• 4 sprigs fresh thyme
• 1 tablespoon fresh lemon juice

Steps

1. Preheat your oven to 450°F (230°C).
2. Season cod with salt and pepper.
3. Arrange 4 large sheets of aluminum foil on your work surface. Place 1 fillet on each sheet.
4. Distribute zucchini, yellow squash, and red onion evenly around each fillet. Season vegetables with salt and pepper.
5. Sprinkle with red pepper flakes to taste.
6. Drizzle each portion with about 1/2 tablespoon olive oil and 1/2 tablespoon white wine.
7. Lay several lemon slices over each fillet and top each with a thyme sprig.
8. Seal the foil packets well so steam is trapped inside, but leave some air space within.
9. Place packets on a rimmed baking sheet and bake for 8 minutes.
10. Carefully open a packet to check if the fish is just cooked through. If needed, reseal and bake for a few more minutes.
11. Serve immediately—open the packets at the table for maximum aroma.