Prep the salmon by brushing each fillet with olive oil, salt and pepper. Once the squash is cooling, bake fillets skin down at 400℉ until the internal temperatures read 135℉ (10-12 min). Flake into bite-sized chunks.
Chop the mushrooms, scallions, parsley and dill. Mince the garlic.
Dry cook the mushrooms for 5-7 minutes on medium heat stirring occasionally then add olive oil, butter, scallions and garlic. Cook until the butter is fully melted.
Add the capers and boursin then stir everything together until the cheese has melted.
Deglaze the pan with white wine and increase the heat to a simmer. Add the lemon juice, dill, parsley, parmesan cheese, salt and pepper then lower the heat. Reduce the sauce until thickened (~5 minutes).
Toss in the salmon and squash, stirring to combine well. Serve warm.