Yes, you can use frozen salmon for oven baking. However, it's best to thaw the salmon before cooking to ensure even cooking and better texture. To thaw frozen salmon, transfer it to the refrigerator and allow it to thaw overnight. If you're in a hurry, you can also use the defrost setting on your microwave. Once the salmon is completely thawed, pat it dry with a paper towel before proceeding with the baking process.