The Modern Nonna

0 Peel the potatoes and then boil them in salted water until fork tender. Drain and put them back into the pot. Use a potato masher to mash them and then add the cheese, milk, salt and pepper to taste and combine. 
1 Let cool slightly and then shape the mashed potatoes into 6 equal size balls. Lightly oil up a baking dish and place them inside. With your hands or a spoon make an indent in each one. Set aside.
2 Cut the chicken into little cubes and add oil into a pan and heat it up. Once hot, sauté the chicken for 4-5 minutes on medium-high. Add your veggies of choice and spices and stir for 2-3 minutes.
3 Add the tomato paste and stir and take it off the heat. Fill your potato nests with the chicken mixture and then top them with mozzarella and bake in a 425F (220C) oven for 15-20 minutes until melted and golden brown.