1. Cut the bacon into cubes, slice the onion and mushrooms, and mince the garlic.
2. Sauté the mushrooms in a little butter in a skillet.
3. In another skillet, sauté the bacon and onions with a little butter (if necessary). Sprinkle the onions and bacon with flour and stir until the flour turns golden.
4. Add the wine, bouquet garni, mushrooms, garlic, and sugar. Season with salt and pepper.
5. Let it simmer over very low heat for 45 minutes. The sauce should become creamy.
6. Before serving, sauté the croutons in a little oil or butter (for a lighter version, toast them in the oven) and lightly rub them with garlic.
7. Just before serving, poach the eggs in a large pot of simmering water with a splash of vinegar.
8. On a plate, place the croutons, top with poached eggs, pour the sauce over... and enjoy your meal!