Reduce heat to medium; press potato mixture evenly with back of spatula. Cook uncovered 6 minutes, without stirring, until liquid is absorbed. Add spinach to skillet; stir until spinach is wilted slightly. Use spatula to make four holes in mixture; crack 1 egg into each hole. Cover; cook 10 to 12 minutes or until whites and yolks are firm, not runny and potatoes are crispy. Meanwhile, in medium bowl, mix milk and topping mix (from Hamburger Helper box).