too much foam in the pour

I brewed a La Fin DuMon but when we pour a glass is 3/4 foam - what did I do wrong?

If you kegged it, the pressure could be too high or your beer hose to the faucet too short (or a combination of both.  Use Beersmith to find you beer's proper carbonation level/temprature and then set your CO2 accordingly. Your beer hose should be at least about 6 ft so the pressure drops gradually from keg to glass.

If you bottled, you put too much priming sugar in it or are serving it too warm.

Also look at the inside diameter of your dispensing tubing. You want small ID.

Bruce