• In a large bowl whisk together the rice flour, turmeric powder and salt. Add water and coconut milk and whisk until mixture is smooth. Strain through sieve if there are lumps. Set batter to rest for 30 minutes.
•Heat up a 10-inch non-stick saute pan or skillet over high heat. Add one tablespoon lard/oil and then add one portion of pork, shrimp, onions, scallions, and mushrooms. Stir fry until pork and shrimp are half done, and ladle 1/2 cup of batter into pan. Swirl pan to coat bottom evenly. Add bean sprouts over half the crepe (on the right). Drizzle another 1 tablespoon of lard/oil around outer edge of crepe and lower heat to medium.
•Cover pan and cook for 1 minute. •Remove cover and continue to cook until edges begin to brown. Loosen crepe from bottom of pan with a soft silicon spatula (hard spatula would break the crepe). When bottom turns light brown and crispy, fold crepe to encase bean sprouts.
•Place pieces of cooked banh xeo inside a lettuce leaf, dip in nuoc cham and eat immediately.