I woke up this morning in the mood for hash browns.
New plant needed: onions. I know, potatoes are the main ingredient, but the best hash browns always have onions.
Bonus possible new plant: herbs (Generic, or parsley)
Factory: Grill
A gazillion factory items could be added for the new plant: caramelized onions, omelet (+peppers and tomatoes), veggie quesadilla, onion tart....the list is endless.