By this age she can have 3 meals and 2 snacks. protein in good - and she can have a good dollop of fat or oil with that - butter, olive oil etc. If no cow milk allergy, she can have yogurt, cheese, custard etc. And if no egg allergy in the family she can have egg. By cereal I mean things like rice, barley, oats, lentils (well, not too many lentils - could be a bit too much fibre) There are often good in stews and casseroles. The slow cooker is often a boon. Babies want food that tastes good too!
You are doing great - as you say keep at it.