Hi there..
My DD went through this stage too..and it was very frustrating to keep cleaning the cooked meals off the floor...but i got one of those rubber brooms with dustpan set..which made it easier to clean.. i didnt make a fuss when she did it bcoz i knew she wouldnt understand and i didnt want to give her any attention for it. The phase passed after about 2 months . I would give her small amounts of food at a time..so if some went on the floor..there was still some to give her..then when there was none left..meal time over.