Cook pancakes according to recipe and set aside 6 pieces.
In a pan, melt butter with oil, add leeks, mix, and season with salt and pepper. Cover (with a lid or aluminum foil), reduce heat, and simmer for 5-7 minutes until tender, without browning. Add chives and mix.
Distribute leeks and then goat cheese evenly over 6 pancakes and fold into squares. Warm on a skillet over low heat and serve immediately.