Step 1

Melt the butter and heat the oil in a pan over medium heat.

Step 2

Add the onion and saute until tender, about 5-7 minutes.

Step 3

Add the garlic and thyme and saute until fragrant, about a minute.

Step 4

Add the cremini mushrooms and saute until the start to caramelized and turn golden brown, about 10-15 minutes.

Step 5

Add the wine, deglaze the pan and cook until most of the liquid has evaporated, about 2-3 minutes.

Step 6

Season with salt and pepper, add the parsley and remove from heat and let cool a bit.

Step 7

Mix the cheese into the mushrooms.

Step 8

Butter one side of each slice of bread and place 2 in the pan buttered side down.

Step 9

Top each with 1/2 of the mushroom mixture and finally the remaining slices of bread with the buttered side up.

Step 10

Grill until the cheese has melted and the bread is golden brown, about 2-4 minutes per side.