I googled what I had just ordered. Turns out tostones are fried plantains. That's cool! I've never had plantains before. Maduros are... also fried plantains. Lol. Good job me.

The cubano sandwiches were the size of a brick, and sooo delicious :D The tostones and maduros were both really different! One tasted almost like potato, the other was soft and sweet and like a banana. Which I guess is what plantains are, haha.