Place green beans in a microwave-safe bowl and fill with enough water to cover the bottom of the bowl. Cover the bowl and steam in the microwave on high power for 2 minutes.

Place bacon in a large skillet and cook over medium-high heat, turning occasionally, until evenly browned, about 10 minutes. Transfer bacon slices to a plate lined with paper towels, leaving drippings in the pan.

Place mushrooms and onion into the pan with the bacon drippings. Cook over medium heat until mushrooms are nice and brown and onion is soft and translucent, 5 to 8 minutes. Season with salt and add garlic; allow garlic to brown, 1 to 2 minutes. Toss in green beans; saute for about 3 minutes. Toss in green beans; saute for about 3 minutes.

Pour wine into the pan and give it a good stir to scrape up any brown bits off of the bottom of the pan. Add bacon to the pan, cover, and let cook until wine is completely absorbed, about 10 minutes.