Preheat your oven to 425°F (220°C) and line a baking sheet with parchment paper.

Clean and slice the mixed mushrooms into thick pieces, making sure they are patted dry.

In a large mixing bowl, combine the sliced mushrooms with olive oil, minced garlic, salt, and pepper.

Spread the seasoned mushrooms out on the prepared baking sheet in a single layer.

Roast the mushrooms in the preheated oven for 20-25 minutes until golden brown and crispy.

While the mushrooms are roasting, prepare the herb dip by mixing sour cream, remaining minced garlic, parsley, chives, lemon juice, salt, and pepper.

Once roasted, remove mushrooms from the oven and sprinkle with fresh parsley, then serve with the herb dip.