Filet Mignon in Mushroom Wine Sauce

unsalted butter (divided)

olive oil (divided)

baby bella mushrooms (thickly sliced)

small or 1/2 medium yellow onion (finely diced)

medium garlic cloves (minced)

chopped fresh thyme (or 1 tsp dry thyme if you must)

each filet mignon steaks (about 1 1/2" thick)

Barefoot Merlot

low sodium beef broth

heavy whipping cream

Salt and Pepper