Heat half the olive oil in a non-stick pan and sauté the gnocchi for 5-7 minutes over medium-high heat, stirring frequently, until the gnocchi become golden in colour. Transfer to a bowl and set aside.
Pour the rest of the olive oil into the pan and sauté the onion for 2 minutes. Add the garlic and sauté for another minute. Then, add the water. Cover and let cook for 5 minutes, until the onion has softened.
Add the Swiss chard and cook for 2 minutes, stirring frequently.