Preheat the oven to 400 degrees F., and lightly spray a 12-cup muffin tin with non-stick cooking spray. Mix the first eight ingredients together in a large bowl. Spoon potato mixture into each prepared muffin cup until about 1/3 full. Gently press the potato mixture down in the middle and up the sides of each cup. Bake until golden brown, about 25-30 minutes. If the nests have puffed up too much in the center, scoop out a little with a teaspoon. Spoon a few tablespoons of scramble eggs into each nest and top with chives.