Heat oil in a Dutch oven over medium heat. Add onion to pan: cook 5 minutes or until tender, stirring occasionally. Add garlic, 2 teaspoons rosemary, and thyme; cook 1 minute, stirring occasionally. Stir in potatoes and next 5 ingredients (through 2 cups water) Bring to a simmer; cook, covered, 20 minutes or until vegetables are tender.