Fried Pierogies with Blue Cheese Dip

In medium bowl, beat cream cheese until soft. Gradually add mayonnaise, beating until smooth. Add salad dressing, beating until smooth. Stir in blue cheese, thyme, and pistachios; set aside. In large skillet, melt butter and olive oil over medium-high heat. Add pierogies in a single layer. Cook for 4 minutes, shaking skillet occasionally. Carefully turn pierogies, reduce heat to medium, and cook for another 4-5 minutes or until pierogies are light golden brown and hot. Place on serving platter and serve immediately with dip.