*Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.
**Nutrient information is not available for all ingredients. Amount is based on available nutrient data.
(-)Information is not currently available for this nutrient. If you are following a medically restrictive diet, please consult your doctor or registered dietitian before preparing this recipe for personal consumption.
Heat olive oil in a saucepan over medium heat; add mushrooms, onion, garlic, balsamic vinegar, Worcestershire sauce, salt, and black pepper. Bring mixture to a simmer and cook until liquid is 2/3 reduced, about 10 minutes; sprinkle with sugar. Cook and stir until sugar is dissolved, 1 to 3 minutes.