Why rice cereal for first food?

[Ambersky]

I bought a box for DD1, tasted it as i was making the first little bowl and nearly gagged it was foul, i decided it would be enough to put me of food for life and gave her pumpkin mash instead
DD2 was BLW'd

[Astrid]

I thought it had something to do with iron. I know my MCHN crapped on a lot about iron levels and that is why she recommend the sludge.