On medium-high heat add 1-2 teaspoons of oil and some onions
Immediately add a few pieces of pork and shrimp. Sauté, lightly mixing until very lightly browned.
Pour in some batter and quickly tilt & rotate the pan so the batter is evenly spread. Add more batter if it wasn't enough to cover the pan.
Add some mung beans, bean sprouts, and cover with a lid for 2-3 minutes, or until bean sprouts are slightly cooked. The batter should also be slightly cooked and transparent around the edges.
Remove the lid, lower heat to medium and wait for the crêpe to become crisp. Fold in half, transfer to a plate and serve immediately.