Heat a large fry pan with a medium heat and add in the olive oil

In the meantime, add the salmon fillets over some paper towels and pat dry, then season with salt & pepper on both sides

Add the salmon fillets into the hot fry pan, in a single layer and skin side down, fry for 3 to 4 minutes per side or until the salmon is just cooked through, then remove from the pan and set aside

Using the same pan with the same heat, add in the chopped onion and garlic, mix continuously, after 3 minutes and the onions are slightly translucent, add in the sliced mushrooms and a dash of salt, continue to mix together for a few minutes

After 6 to 8 minutes and the mushrooms are lightly sauteed, add in the flour, mix continuously for 2 minutes, then add in the milk and vegetable broth, and gently mix together for a few minutes

After about 4 minutes and you've ended up with a slightly creamy sauce, add in the chopped parsley and season with salt & pepper, mix together, then add the salmon fillets back into the pan, all in a single layer, spoon some of the sauce over the fillets, and simmer for 1 to 2 minutes

Serve directly out of the pan, topped off with a kiss of fresh lemon juice, some cracked black pepper, and chopped chives, enjoy!