Hi all, my daughter turns 1 in 3 weeks time. Up...

Hi all, my daughter turns 1 in 3 weeks time. Up until 3 weeks ago she was eating everything I fed her, now she's discovered the art of tantrums whenever I try to restrain her either in her highchair or carseat. At first I thought it was her teething and only gave her cold foods until we were at the inlaws house and she ate EVERYTHING her grandmother fed her; casserole, soup, fruit and yoghurt. The very next day it was the same thing except this time she's added breakfast to the 'mummy I don't want' list. I've tried offering a variety of foods but she just won't give. Is she playing the power struggle card with me? Is this just a phase? Distressed mummy ;-(