STEP 1: PREPARE THE INGREDIENTS

1. Wash and Cut Potatoes: Scrub the Yukon Gold potatoes thoroughly. Cut them into bite-sized pieces, leaving the skins on for added texture and nutrition.
2. Slice the Mushrooms: Clean and slice the mushrooms. If using cremini mushrooms, they can be left whole if they’re small.
3. Chop the Onion: Dice the onion into small pieces for even distribution in the dish.

STEP 2: SAUTÉ THE AROMATICS

1. Heat Olive Oil: In a large skillet, heat the olive oil over medium heat.
2. Sauté the Onion and Garlic: Add the diced onion and cook until it becomes translucent, about 4-5 minutes. Add the minced garlic and sauté for an additional minute until fragrant.
3. Add Mushrooms: Stir in the sliced mushrooms, cooking until they release their moisture and become tender, about 5-7 minutes. Season with a pinch of salt and pepper during this step to enhance their flavor.

STEP 3: COMBINE IN THE SLOW COOKER

1. Layer the Ingredients: In your slow cooker, add the chopped potatoes. Pour the sautéed mushroom mixture over the top.
2. Add Broth and Seasonings: Pour in the vegetable or chicken broth and sprinkle the dried thyme, rosemary, salt, and pepper over everything.
3. Mix Gently: Using a spatula, gently stir to combine all the ingredients, ensuring the potatoes are well-coated with the broth and seasonings.

STEP 4: COOK

1. Set the Slow Cooker: Cover the slow cooker with the lid and set it to cook on low for 5.5 hours or on high for about 3 hours. The potatoes should be fork-tender when finished.
2. Check for Doneness: About 30 minutes before the cooking time is up, check the potatoes for doneness. They should be tender but not mushy.

STEP 5: SERVE

1. Garnish: Once cooked, stir gently to combine and taste for seasoning. Adjust with more salt or pepper as needed.
2. Add Optional Toppings: If desired, sprinkle freshly chopped parsley and grated Parmesan cheese over the top for added flavor and presentation.
3. Transfer to Serving Dish: Serve directly from the slow cooker or transfer to a decorative serving dish.