Reduce heat to low, and carefully add leeks so that they do not fall apart.

Add leeks; cook until tender, for 5 to 10 minutes.

Add leeks and saute over low heat until tender but not brown.

Add leeks, and blanch until tender, for 3 to 5 minutes.

Add leeks and cook, stirring until tender but not colored, 8 to 10 minutes.

Add leeks, season with pepper and sauté over low heat until soft but not brown.

Add leeks, and sauté over low heat until softened, about 5 minutes.

Add leeks and cook until tender, about 25 minutes.

Add leeks, and sauté slowly over low heat until tender but not brown, about 10 minutes.

Add leeks and cook until softened, about 5 minutes.