Heat the olive oil in a large pot over medium heat. Add the onion and garlic, and cook until softened.
Add the carrots and potatoes, and cook for a few minutes.
Pour in the vegetable broth, thyme, and rosemary. Bring to a boil, then reduce to a simmer. Cook until the vegetables are tender, about 20 minutes.
While the stew is simmering, prepare the dumplings. In a mixing bowl, combine the flour, baking powder, and salt. Stir in the milk and melted butter until just combined.
Drop spoonfuls of the dumpling batter onto the surface of the simmering stew. Cover and cook for another 15-20 minutes, or until the dumplings are cooked through.
Stir in the peas and cook for an additional 5 minutes. Serve hot.
Notes:
Feel free to add any other vegetables you like to the stew.