Heat 2 tablespoons oil in a saucepan over medium-high heat. Add the finely chopped onion and ground meat. Cook for about 10-12 minutes, stirring occasionally, until the meat is browned and crumbly.
Pour in 0.25 liters of water or broth. Add the lovage (finely chopped) or use Maggi seasoning. Bring to a simmer.
In a cup or small bowl, mix a little flour with some cold water to form a smooth paste without lumps. Stir this mixture into the simmering meat to thicken it.
Simmer for at least 5 more minutes, stirring frequently to prevent the bottom from burning.