On holiday my son just eats what we eat. eg, breakfast usually it's buffet, so he has some pancakes, scramble eggs and porridge. Lunch and dinner, depending where we are, he will have either pasta, noodle soup or fried rice or rice with dishes. He doesn't take those fried stuff. We only give him non-fried stuff.
20mth old should be able to do a fair amount of chewing so I guess outside food is ok? Unless you're unwilling to expose her to outside food, then it's best to bring your slow cooker along and/or jarred baby food.