Heat olive oil in a dutch oven (or other large pot) over medium heat.
Add onions, celery, and carrot to pot. Season lightly with salt and pepper, then cook until onion is translucent, stirring frequently (about 5 to 7 minutes).
Increase heat to medium-high, then add mushrooms to pot. Cook, stirring frequently, until mushrooms are tender, any liquid they release has evaporated, and veggies are starting to brown (about 7 to 10 minutes).
Mix in garlic, then cook until fragrant, stirring constantly (about 30 seconds).
Add Guinness, then stir well, scraping up anything that's stuck to the bottom of the pot. Continue cooking, stirring frequently, until beer is reduced by about half (3 to 5 minutes).
Mix in potatoes, parsnips, broth, tomato paste, soy sauce, bay leaves, rosemary, and thyme. Bring to a boil, then cover pot, leaving a small crack. Reduce heat to a simmer, then cook for about 20 to 25 minute or until the veggies are tender.
Stir in parsley and season to taste with salt and pepper.
Serve stew hot. Enjoy!
Notes
Make sure to check out info before this recipe for helpful tips on how to cut the veggies, substitution ideas, and more!If you'd prefer not to use beer, feel free to use vegetable broth in its place.