Preheat oven to 350 degrees F. Place each salmon filet on a square of parchment paper and top with pesto. Wrap pesto around salmon like a present. Bake in preheated oven until flaky and internal temperature reaches 145 degrees F, about 20 minutes.
While the salmon is cooking, cook the pasta in salted boiling water according to the instructions.
Add the fresh spinach to two bowls.
When the pasta is done cooking, drain it and set aside. Add the butter, olive oil, and garlic to the pot and cook the garlic until golden brown, about 2-3 minutes. Add the zest, lemon juice, capers, and cooked pasta to the pot. Toss to combine.
Add the hot pasta to the bowls on top of the spinach. Top with a hot salmon filet.
Notes
Recipe to make your own homemade pesto: https://selfproclaimedfoodie.com/basil-pesto/