it is pretty simple.

[url=http://www.d20srd.org/srd/variant/races/reducingLevelAdjustments.htm]
[url=http://www.d20srd.org/srd/monstersAsRaces.htm]

Basically it takes longer to level up and gain bonuses. I believe I know a book with a LA 0 Minotaur I am checking for.

Edit: yep, Dragonlance Campaign Setting has a LA 0 Minotaur race if you want to use that.