How to Make It
In a large skillet, cook half the bacon over moderate heat until just crisp, 4 to 5 minutes. Transfer the bacon to a bowl and repeat with the remaining bacon. Pour all but 2 tablespoons of the bacon fat into a small glass measuring cup.
Reheat the bacon fat in the skillet. Add the diced baguette and cook over moderately high heat, stirring a few times, until crisp, about 4 minutes. Transfer the croutons to a plate to cool. Toss in the bowl with the bacon.
Bring a large skillet of water to a boil. Add the white wine vinegar. Break 1 of the eggs into a small cup and slide the egg into the water. Repeat with 3 more eggs. Simmer over moderate heat until the whites are firm and the yolks are soft, about 3 minutes. Using a slotted spoon, transfer the poached eggs to a large platter lined with paper towels. Repeat with the remaining eggs. Keep the poaching water at a low simmer.
Measure the reserved bacon fat into a large skillet. Add enough peanut oil to equal 1/3 cup. Add the shallots, season generously with salt and pepper and cook over low heat until softened, about 3 minutes. Add the garlic and cook until fragrant, about 1 minute. Whisk in the red wine vinegar and remove the dressing from the heat.
Return the poached eggs to the simmering water to reheat for 30 to 40 seconds. Bring the dressing back to a simmer over low heat. Add the frisée to the bacon and croutons in the bowl, add the hot dressing and toss well. Season with salt and pepper. Mound the salad in serving bowls or on plates and top each with a poached egg. Serve at once.