Sweet Summer Corn Soup

Name: Sweet Summer Corn Soup
Ingredients: 2 qt/2 L Easy Vegetable Stock or low-sodium vegetable broth; 6 ears fresh sweet corn; 3 tbsp olive oil; 2 large yellow onions, medium dice; 4 large stalks celery, thinly sliced; 2 tbsp fresh thyme, chopped, or 2 tsp dried thyme; 1 1/2 lb/680 g yellow potatoes (such as Yukon Gold), medium dice; Salt; 1/2 tsp paprika; Freshly ground black pepper; Big pinch of cayenne pepper; Big pinch of ground coriander; 1 1/2 cups/360 ml plain, unsweetened soymilk; 1/2 cup/15 g cup packed chopped fresh flat-leaf parsley; 1 red bell pepper for garnishing