Heat coconut oil in a large skillet.
Add in garlic and ginger and cook for 1 minute.
Add in carrots and celery and cook for 3 minutes, stirring regularly, until vegetables start to soften.
Add in the beans and water chest nuts, continue stirring, and cooking another 2-3 minutes.
Turn off the heat and add in spinach and scallions, mixing well, so that the heat of the vegetables wilts the spinach.
In a small bowl, combine the peanut butter, tamari, rice wine vinegar, agave, and chili oil. Mix well.
Slowly add in the hot water, as you continue to mix, until you get a smooth and thinner consistency.
Turn the heat back on under the skillet to medium, and pour the peanut butter mixture onto the vegetables. Cook and mix well until they are heated all the way through.
Lay the lettuce leaves on a plate and spoon the vegetable mixture into each leaf. Serve immediately.