It's easiest if you prepare your vegetables first. I pan-caramelized my shredded brussels sprouts (cook on medium in a little olive oil with some salt and pepper for about 5 minutes). Then add the shallots and cook for a couple minutes, then add the spinach to wilt. I roasted my golden beets as well.
Boil water for the pasta, add a handful of salt, and then add the pasta. Cook until al dente, usually 5-6 minutes. Drain.
While the pasta is cooking, make your sauce. Add the creme fraiche, olive oil, lemon zest, and lemon juice to a bowl and whisk together until smooth. Add a little salt and pepper to taste.
Put the flaked salmon and cooked vegetables (and capers, if using) in a large bowl and add the drained pasta. Pour the sauce on top and toss everything together. Serve immediately (though this is also amazing as warm or cold leftovers).