To prepare a spinach and vegetable soup with radishes recipe, first you will need to prepare the ingredients for the soup. Wash the spinach, cut it in half lengthwise, and then chop it into bite-sized pieces. Add the chopped vegetables to the pot and cook them over medium-high heat until the vegetables are tender, about 5 minutes. Then, add the water and bring the mixture to boil, then reduce the heat to medium and simmer for 10 to 15 minutes, or until it is reduced by half. Remove from heat and stir in the sour cream, thyme, salt and pepper to taste. Serve immediately.