Ignore it. Don't overload the tray - better to put 3 bites on, that way there's less to clear up and less to stress over. If she throws it all, ignore it, then if she starts to fuss just say casually 'Oh look, you dropped your food, do you want some?' and put it back on her tray and then go back to ignoring.
My LO used to like food presented in different ways, for example, little tiny bits of different foods in muffin cases - so he would be playing with it and then 'accidentally' eat bits at the same time!
If she doesn't eat anything, do not stress. Don't offer her something else, don't give her extra milk, just say, 'OK, lunch is done!' and then try again at tea time.
don't worry about all the food in the freezer - soon she'll be spoon feeding herself and you'll be able to use it all up as bases for soups, sauces for pasta, etc.