Skin and boil potatoes until cooked. In the meantime, saute ground chicken and pork in olive oil with onions and garlic. Take out before they are fully cooked, in the same pan saute the carrots until tender and take out and put with chicken mixture. In the same pan make the gravy using butter, oil, flour, chicken stock, salt, and pepper. Add the chicken/pork/carrot mixture into 13 by 9 inch pan and add the defrosted peas evenly. Pour over gravy mixture.
When sweet potatoes are cooked mash with butter, sour cream, gruyere cheese, parmesean cheese, and fresh chives. Evenly spread potato mixture over chicken and gravy and place in oven under the high broiler setting until the potatoes are browned. Take out of oven and enjoy!