Bring a large pot of water to a boil. Add pelmeni and cook stirring occasionally for 5 mins. Drain and set aside.
In a large sauté pan, heat oil over medium heat. Add onions and garlic and sauté for 2-3 mins until translucent.
Add mushrooms and rosemary and saute for 5-6 minutes until mushrooms are golden.
Add wine to deglaze the pan and saute for an additional 1-2 mins, season with salt and pepper. Remove mushrooms from pan and keep warm.
Turn heat up to high, add pelmeni and fry for 2-3 mins until golden & crispy.
Toss with mushrooms and serve warm.