I've made a few corrections . When you are talking about a quantity, like "I can eat a lot", the spanish way to say that is "puedo comer mucho". But in that case what you are trying to say is that "I can eat so much" and it's spelled "puedo comer demasiado". "tan mucho" doesn't exists, it's a redundancy. I'll contribute with my favorite food!: Mi comida favorita son las empanadas, que es un comida típica aquí en Argentina .