Ok, coming from one who cooks.....a lot, exactly what are you looking for? Yes it will cook a turkey breast. Marinade your breast in a mix of around a gallon of chicken stock, 1/4 cup brown sugar and 2/3rd cup of salt for about 8-10 hours. After the marinade place the breast with about 2 cups of the marinade in the crock pot. Season with a little salt, pepper and I prefer McCormick's Italian Seasoning on the breast. Run on high for about 7 hours. Check internal temp center of breast one side or the other and it should be 160 degrees Fahrenheit. One of the other little things I do and not everybody does this but I inject melted butter mixed with onion powder into each breast portion. This works for me but not for others who are afraid of butter. This will help keep the breast tender and very tasty. The remaining mix of marinade and cooked turkey can help to make the gravy (you only use a few tablespoons of the liquid not the whole amount as the salt factor would overwhelm the gravy) I prefer to marinade before I go to bed then start the cooking before I go to work so when I get home everything is done turkey wise.
Hamilton Beach website would have the best answer. The top couldn't take the higher heat at it has a rubber gasket. Don't think oven to liner for the crockpot would be a problem but you would have to wait a while for it to cool down enough to hold the lid. So best bet go to the website for their answer.
Definitely is a ceramic insert as is typical on many slow cookers. This has been a great slow cooker for me btw. The heat settings are appropriately modulated so that they are not too low or too high IMO.
Made in China, of course, and unfortunately so in my opinion.
Do stay AWAY from the slow cooker from Sur la Table. It, too, is made in China and costs a TON more.
Worse, the non-stick interior from the Sur la Table unit chips and peels after very short usage according to the reviews.
We did a lot of shopping. Our cooker has performed excellently for many meals.