Lemon White Fish en Papillote with Sweet Potato Fennel Saute
A healthy and elegant meal featuring delicate white fish steamed in parchment with lemon, capers, and garlic butter. The fish stays incredibly moist while developing bright, clean flavors from the aromatic steam. Served alongside sweet potatoes topped with butter and a savory fennel-tomato saute that adds Mediterranean flair. Perfect for dinner parties or weeknight meals when you want something special without much cleanup. The parchment packets create individual portions and lock in all the flavorful juices.
Ingredients
- 2 cloves garlic, chopped
- 1 whole lemon, thinly sliced rounds
- 1 tbsp capers, drained and rinsed
- 1 lb white fish, any variety like tilapia, hake, flounder or halibut
- 4 pieces parchment paper, sub foilaluminum foil1:1gluten-freedairy-freelow-carb
works well but less elegant presentation
- 6 tbsp butter, divided
- 4 medium sweet potatoes
- 1 bulb fennel, sliced
- 1 tbsp olive oil
- 1 can diced tomatoes, preferably fire-roasted, 14 oz
Instructions
- 1
Heat oven to 425F
- 2
Cook sweet potatoes in microwave or oven until fork-tender
- 3
Prepare fish packets with garlic, lemon, capers, and butter
- 4
Bake fish packets until fish flakes easily with fork
- 5
Heat olive oil in saute pan over medium heat
- 6
Add fennel with pinch of salt and saute until golden brown
- 7
Add garlic and tomatoes, bring to simmer
- 8
Simmer until liquid reduces, season with salt and pepper
- 9
Slice open sweet potatoes, mash with fork and top with butter
- 10
Serve fish in packets with sweet potatoes and fennel saute
Tips
Test fish doneness by carefully opening one packet to check if it flakes easily with a fork.
Start sweet potatoes first as they take the longest to cook, then prepare fish packets while they bake.
Keep fish packets sealed when serving to preserve the flavorful lemon butter sauce inside.
Good to Know
Cooked fish should be refrigerated and consumed within 2 days. Sweet potatoes can be stored in refrigerator for 3-4 days.
Sweet potatoes can be cooked up to 2 days ahead and reheated. Fish packets can be assembled 4 hours ahead and refrigerated.
Serve immediately while fish is hot and steam is still visible when packets are opened.
Common Mistakes
Don't overcook fish as it will become dry and flaky
Seal parchment packets tightly to prevent steam from escaping during cooking
Don't skip pricking sweet potatoes to avoid them bursting in microwave or oven
Substitutions
Dairy-Free Swaps
works well but less elegant presentation
General Alternatives
FAQ
Can I use frozen fish for this recipe?
Yes, but thaw completely first and pat dry. Frozen fish may release more water, so adjust cooking time slightly and ensure packets are well-sealed.
What if I don't have parchment paper?
Aluminum foil works as a substitute. Create tight seals to trap steam, but presentation won't be as elegant as parchment packets.
How long will leftovers keep?
Cooked fish keeps 2 days refrigerated. Sweet potatoes last 3-4 days. Reheat gently to avoid overcooking the delicate fish.