Mix mayo, pesto and Worcestershire sauce together.
Break toasted pecans into small pieces (a rolling pin works great for this).
Place salmon fillets in a baking dish large enough so that they don’t overlap. Spread the pesto/mayo mixture over the top of the fillets. Sprinkle the pecan pieces over the pesto mixture. Bake 10-15 minutes depending on the thickness of the fillets. Sprinkle the baked salmon with the diced tomatoes. Tear the basil leaves into small pieces over the tomatoes and serve.
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