In a large mixing bowl combine cream cheese, sour cream, greek yogurt, shredded cheeses, garlic salt, cayenne and green onions. With a wooden spoon, stir until well combined.
Pour cheese mixture into a small casserole dish or 9 inch round pie pan. Place in the oven for 10-15 minutes or until bubbling and cheese and began to turn golden brown on top.
While dip is baking in the oven the bacon can be cooked in the microwave. Place 4-5 pieces of bacon on a plate and cover with a paper towel, cook for 1 minute per slice or until desired doneness.
Remove bubbling hot cheese dip from the oven and sprinkle with crumbled bacon. Serve with crackers, crusty bread or vegetables.