Preheat the oven to 425. Rinse and pat dry salmon filets. Place salmon skin-side down on a baking sheet. Combine dill, feta, olive oil, juice from 1/2 the lemon, and seasoning in a bowl until well combined. Top salmon with mixture. Bake for 20-25 minutes, or until salmon is flaky. When the salmon is finished, squeeze the other half of the lemon over it!