Preheat oven to 425degrees. In a bowl, combine biscuit mix, milk, melted butter and chives; mix just until moistened., Turn dough onto a lightly floured surface; knead gently 8-10 times. Pat or roll to 3/4-in. thickness; cut with a floured 2-1/2-in. biscuit cutter. Place 2 in. apart on an ungreased baking sheet. Bake 12-14 minutes or until golden brown., Meanwhile, in a large bowl, whisk eggs, milk and salt. Place a large skillet over medium heat. Add prosciutto and green onions; cook until prosciutto begins to brown, stirring occasionally. Stir in butter until melted. Add egg mixture; cook and stir until eggs are thickened and no liquid egg remains. Stir in cheese; remove from heat., Split warm biscuits in half. Fill with egg mixture.