Dr Keith A Sarver DC, NRT 
Night Shade Vegetables include the following:
Potatoes:
- baked
- mashed,
- scalloped,
- chips
- fries
- knishes
- pierogies
Potato water is in
- breads
- buscuits
- matzo
- soups
- stews
- vodka.
Beware that potato is also included in these ingredients:
- hydrolyzed vegetable protein
- modified vegetable protein
- modified food starch hidden in packaged meats, cold cuts and seafood and other processed foods.
Other sources of Nighshades
- Tomatoes and their sauces (like barbecue and brown sauces),
- seasonings
- condiments like ketchup and steak sauce
- prepared meats (like meatloaf)
- baked beans
- gravies and salad dressings containing them.
- Peppers include red, green, orange, yellow, jalapeno
- chili
- cayenne
- curry
- pimentos
- paprika
- Flaxseed and olive oils
- vegetables, including sweet potatoes
- many other spices like black pepper (not the same family), garlic, ginger, basil, rosemary and more.
- All fresh unprocessed meats, fowl and seafoods
- wines and fruits,
- nuts
- beans
- cheeses
- grains and herbs
Sweet potatoes are ok -- they are from a different family.