Homemade McDonald's Hash Browns

Name: Homemade McDonald's Hash Browns
Prep time: 30 min
Cook time: 15 min
Total time: 45 min
Cuisine: American
Ingredients: 2 Yukon gold potatoes (medium, 10oz.(300 g.)); 1 Russet potato (large, 10oz.(300 g.)); 1 tsp. Kosher salt; 6 tbsp. corn starch; 2 tbsp. vegetable oil (for sautéing); 2 C. vegetable oil; 3 slices mozzerella cheese (pre-sliced)