Italian Mushrooms and Spinach

Heat the olive oil in a large skillet over medium-high heat.

Saute onion and garlic in the oil until they start to become tender.

Add the vinegar and the white wine.

Add the mushrooms, and fry until they begin to shrink, about 3 to 4 minutes.

Toss in the spinach, and fry, stirring constantly for a few minutes, or until spinach is wilted.

Reduce heat to low, and simmer until the wine has almost completely absorbed. Season with salt and pepper to taste. Serve.