Heat the oil and melt the butter in a pan.
Add the onion and cook until it starts to caramelize, about 20
minutes.
Add the mushrooms and saute until they start to caramelize, about
20 minutes.
Add the garlic and thyme and saute until fragrant, about a minute.
Season with salt and pepper.
Add the wine, deglazed the pan and cook until it has evaporated.
Puree 1/2 of the mushrooms in a food processor.
Mix the mushrooms, cream cheese, sour cream, mayonnaise,
mozzarella and parmigiano reggiano and place in a baking dish.
Bake in a preheated 350F oven until bubbling and golden brown
on top, about 20-40 minutes.
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