Directions

1. Soak the dried peas overnight, then rinse and drain. Place peas in a large pot with enough water to cover by a couple of inches. Add the Mirepoix, and bring to a boil. Cook until tender, about 1 hour.
2. Preheat the oven to 200 degrees F (95 degrees C). Coat a large cookie sheet with olive oil. It helps to use a cookie sheet with sides to keep them from rolling off.
3. Drain the peas, and transfer to the cookie sheet. Roll them around in the oil by tilting the pan, or stir with your hand. Bake for 4 to 8 hours in the preheated oven, stirring every 30 minutes or so, until peas are dry. Remove from oven, and season with salt, onion salt, and garlic powder.
4. While the peas are roasting, mix together the wasabi powder, tahini, rice vinegar, and Dijon mustard in a large bowl. When the peas are ready, pour them into the bowl, and stir to coat with the wasabi mixture. Pour them back onto the cookie sheet in a single layer, and return to the oven.
5. Bake for another 10 minutes in the preheated oven, or until the aroma becomes very strong, and the coating is dry.