Banjoe wrote:...We've gone too light on the fat so that's probably our biggest mistake however, we heard that TVP can be used as a healthy replacement for fat.
Any idea if this actually works and, if so, what ratio to meat should we aim for?
I can see why folks thought you wanted a healthy replacement for fat.
Mealy sausage may or may not be a result of fat content. My first suspicion is that your ingredients are too warm while you are making your sausage. Fat smear will lead to mealy, dry sausage. It can be a result of grinding meat and fat that haven't been properly chilled, or from mixing sausage that has been allowed to get too warm, or from over-mixing. All of these may cause a mealy texture, even if your meat-to-fat ratio is perfect.
Unless you know without a doubt that your fat content is way low, I'd re-examine your technique before deciding that you need to use more fat, and even then, besides adding appropriate fat, I'd still re-examine your technique, If I were you.
Not chilling your meat and fat enough is a prime factor for inferior sausage.