Step 1

Heat oven to 350 F.

Step 2

Butter a glass casserole -large enough so that the fillets aren't crowded.

Step 3

Lay the fillets in a single layer in the glass casserole.

Step 4

Whisk the melted butter, lemon juice, minced onion, salt, paprika, red pepper flakes, black pepper until well blended. (Also add the capers if you wish.) Pour the sauce evenly over the fillets.

Step 5

Bake in the heated oven for 20 to 25 minutes. The fillets will be firm but still moist.

Step 6

Serve immediately and spoon some additional sauce over the fillets.