If making the sriracha mayo, combine ingredients with a whisk. Place in an airtight container and refrigerate until ready to serve.
Begin by cooking rice. Combine coconut milk, water, and rice in a large pot. Heat to a simmer, then stir, cover, and reduce heat to low. Keep covered and cook until fluffy, about 15-20 minutes.
In a wok or frying pan, brown beef and drain fat.
Add in the rest of the beef ingredients and simmer for 5-6 minutes, until all ingredients are well combined.
To serve, scoop rice onto large lettuce leaves. Scoop beef on top of rice. Top with sriracha or sriracha mayo. Roll up to eat, and enjoy!