Baked salmon w/ creamy dill sauce

I've been craving salmon for quite some time now so I stopped at my local supermarket and picked up a fairly large salmon fillet. I believe this would work will with trout too. Here's how I prepared it:

The ingredients:
Olive oil or Pam cooking spray
2lbs salmon fillets
1 lemon, 1/2 of it cut into slices, reserve juice of other half
1 small onion, sliced
1/2 stick of butter
2 garlic cloves, finely chopped
fresh dill, chopped
paprika
salt and pepper

Dill sauce:
1/3 c mayo
1/3 c sour cream
1/4 c dry white wine (vermouth)
1Tablespoon capers
1Tablespoon caper brine (juice in caper jar)
1 tsp lemon juice
1-2 tsp prepared horseradish
1T fresh dill, chopped
1/2 tsp garlice salt or powder
Black pepper to taste

Preheat oven to 375. Spray the bottom of a baking dish with olive oil cooking spray. Then add the fish to the pan. Season fish with paprika, salt and pepper. Cut butter into 1/4" thick pads and scatter over the top of the fish. Layer onions, garlic, dill and then lemon slices over the top of the fish. Cover dish with aluminum foil and bake for about 20 minutes or until fish easily flakes apart.

Meanwhile, place all ingredients for the dill sauce into a medium bowl and whisk together until thoroughly mixed. Once salmon has finished cooking, place it on a serving plate, remove the lemons, and cover with the dill sauce. Don't skip making the dill sauce because it takes this dish to a whole new level!

Here is what it looked like right out of the oven prior to putting on the dill sauce. Unfortunately, I didn't get any pics of it after putting on the dill sauce. For some reason I couldn't get the image to work here so use the link to see the pic.
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