Tofu,which looked like stacked wedges of rubbery white sponges.
The words "rubbery white sponges" stood out to me because they make the food sound unappetizing and strange. Amy could have described the food in a more appetizing way, but instead she compares it to something rubbery and spongy. I think this shows how uncomfortable and embarrassed she feels about her family's food and traditions, especially because she wants to fit in with American culture.