Salmon with Angel Hair in Vodka Sauce

I'm trying to cook from the pantry and the freezer as much as possible this week. I found a piece of salmon buried under the ice cream, a few lemons in the fridge, and a can of tomatoes in the pantry, so I cobbled this together, inspired by a fancier recipe I found on Epicurious. The kids devoured it, and hubby smiled, so I think it's a keeper.

Salmon with Angel Hair Pasta in Vodka Sauce

3 cups chicken stock
1 cup heavy cream
1/2 cup vodka
1 lemon
1 bag baby spinach
1 onion, chopped
1 14.5 ounce can diced tomatoes
1 pound salmon filet

In a small saucepan, mix the chicken stock, cream, and vodka and bring to a simmer. Cook until reduced by 1/3. Meanwhile, bring a large pot of water to boil and heat the broiler. In a large skillet, saute the chopped onion until it begins to caramelize. Add the spinach and saute until it wilts. Add the chopped tomatoes, and cook down a bit. Pour the stock/cream/vodka mixture into the sauteed vegetables, and continue to cook down. Season the fish and pop it in the broiler; cook until done. After you take the fish out of the oven, cook the pasta. Dump the cooked pasta into the sauce. Serve the pasta, topped with a piece of the salmon.