My Roommate Eats Like a Horde of Hungry Bears

Hey everyone! So I'm super excited to be in college and all, but there's this one thing that's been driving me nuts. My roommate, Jane, is like some kind of hungry bear from a storybook. She eats ALL the time and leaves her dishes everywhere. One night, she was snacking while watching TV, and it looked like she had three plates of snacks spread out in front of her! I mean, come on, right? It's like she never stops eating or cleaning up after herself. I tried talking to her about it gently, but she just laughed it off. Is this normal roommate behavior? Should I just learn to deal with it, or is there a better way to approach this without being rude? Your advice would be a lifesaver!