When cooking the sausages, reduce the heat to low or medium-low if necessary to avoid cracking or oil splatting. This means they will need to cook for longer, but will achieve an even and beautiful golden brown crust on the outside.
We wouldn’t recommend adding extra salt as the sausages can be very salty. Instead, simmering will draw out salt from the sausages and season the sauce. However, you should check the sauce for seasoning and adjust to your liking.