1. Soak the cashews in hot water for about 15 minutes. Alternately, you can soak them overnight in cool water.
2. Drain the cashews and place them in a blender with 1 cup water. Blend on high speed until creamy and very smooth. Transfer to a jar and store in a cooler until you’re ready to make the soup at camp.
1. Get your campfire going and prep it so there is eventually a nice bed of hot coals to place your dutch oven on.
2. First, roast the chiles. Char the skin on all sides of the jalapeno and anaheim chiles by holding them with long tongs over the flame of a campfire or stove. Scrape off skin with a spoon. If too tough, cover the hot chile with plastic wrap for 5 minutes to steam and try again. Finely chop the chiles and set aside.
3. Second, roast the corn. Remove the husks and silk from the corn and wrap in foil. Place in the campfire directly on the coals. Cook, turning every few minutes to keep it from burning. A little color is good, and adds to the flavor of the soup in the end, but you don’t want it completely burnt. Remove from the fire and set aside to cool. When cool enough to handle, cut the corn off the cobs and set aside.
4. To make the chowder, place the dutch oven over the hot coals of a campfire. Add olive oil and sauté onion and garlic until translucent. Add the potatoes and sweet potatoes and cook for a few minutes, until they get slightly brown. Add the chiles, corn, and spices, and cook for another minute. Add the vegetable broth and cover (no need to put coals on top of the dutch oven). Simmer until potatoes are tender, about 10 minutes. Stir in all the cashew cream and continue cooking until the soup is thickened. Season to taste with salt and pepper.
5. Serve hot with tortilla chips, avocado, and green onions.