Emma, well done on still breastfeeding. It sounds like things are going very well. It is very exciting when our little ones start new things, isn't it? I remember hanging out to start solids with DS1 although I have to admit after all the mess I later wondered why I was so keen

I wonder, is your MCHN on the older side? She is quite right that Farex is not a good food to give babies but she doesn't seem to be aware of the medical research that says solids before 4 months can be very harmful. Some are quite old school and remember when the guidelines were 8 weeks, 12 weeks etc. Now the guideline says to give solids at around 6 months, but not before 4 months. Is there a reason why you've decided to start so early? There are a few reasons why the guidelines changed to 6 month - one is that many babies' digestive systems are not ready for solids until then and damage can be done by starting earlier, and another is that food replaces breastmilk which is still very much needed up to 6 months for growth and brain development (breast milk is the only "food" needed for the first 6 months and is the very best thing for growth and brain development as it's purpose made).

Farex tends to be the first food that many mums choose to use but unfortunately it has no nutritional value. If you google baby led solids or look up some threads on here, you'll find that it is becoming more common to give babies family foods from the beginning (eg meat and veggies). There are lots of benefits to this - one is that meat is the best source of iron and zinc for your baby (don't believe the added iron label on baby foods, your baby can't absorb the iron so it's going in one end and out the other) and iron and zinc are vital for brain development and iron is the first nutrient needed from a source other than breastmilk at some time in the second 6 months of the baby's life. So your MCHN is spot on in that sense, although I'm not so sure about a broth. At your little one's age though, she is too young for finger foods but by the time she is ready for solids she can have them.

If you would like some literature to show your MCHN about why solids under 4 months is not good, you can do some googling and let me know if you want some references.

ETA I just remember that the thread that is linked to in my sig is a pretty good starting point for making the decision about when to start solids.