Toddler Food

Hey everyone! So my one year old doesn't have teeth yet. I've been trying to feed him different food, and so far he will only eat bananas, yogurt, his baby cereal with whole milk, mashed potatoes with cheese, avocado, sweet potatoes, sometimes eggs, refried beans, sometimes pancakes, sometimes meatballs, and chicken in tiny pieces. He also eats those puff snacks that dissolve. His Dr said to replace one of his bottles of milk with a pediashure, so he's drinking that as well. I'm worried he isn't getting enough nutrition. Is anyone else in the same boat? Do you have any food ideas?