Wash and clean the rhubarb and cut it diagonally into slices. Dab the meat dry and season with salt and pepper. Heat oil in a pan. Fry the steaks for 8-10 minutes while turning.
In the meantime, let sugar, butter and vinegar simmer for about 5 minutes. Then add rhubarb and peppercorns, bring to the boil again and remove from the heat. Let rhubarb simmer for 3-4 minutes. Wash the thyme and dab dry.
Pluck off the leaves and add them to the rhubarb, except for something to sprinkle. Flatten the garlic clove. Heat olive oil in a pan. Add the garlic clove and fry the baguette slices on both sides until golden brown.
Arrange meat and rhubarb sauce, sprinkle with thyme. Serve with bread.