To make Anderson's Split Pea Soup soups recipe, first you will need to prepare the ingredients for the soup. Peel the peas and cut them into small cubes. In a large pot, heat the olive oil over medium-high heat. Add the chopped onion and cook until the onion is translucent, about 5 minutes. Stir in the diced celery, carrots, and bell pepper. Cook the vegetables until they are tender, 5 to 6 minutes, stirring occasionally. Pour the vegetable stock into the pot and bring to boil. Reduce the heat to medium and simmer for 10 to 15 minutes or until thickened. Remove from heat and add the thyme, salt and pepper to taste.