In a deep pot, add ¼ cup extra virgin olive oil, onions, celery, garlic and sauté on medium heat until the onions are very soft. Add the sweet potato and spices. Continue to sauté until the spices are fragrant and sweet potatoes are coated with oil, approximately 3 minutes.
Add the stock and bring to a simmer. Cook until the sweet potatoes begin to soften approximately 8 minutes. Add the corn and red pepper.Simmer for 10 minutes then turn off the heat.
Remove ½ of the soup and blend in batches until smooth and creamy. Then return the blended soup to the pot. I use an immersion blender. Adjust the seasoning with a little salt.
Toast the pumpkin seeds briefly in the oven at 375°F (approximately 8 Goominutes) until they begin to darken and have a pleasant nutty aroma. Remove from the oven and place in a bowl. Then sprinkle on top of the chowder just before serving.