In a medium skillet, cook bacon over medium-high heat until browned. Remove from skillet, and let drain on paper towels, reserving drippings. To skillet, add butter, melting in reserved drippings.
Add mushrooms, and season with salt and pepper. Cook, stirring occasionally, until browned and tender. Remove from heat and set aside.
In a small bowl, combine frisée, bacon, mushrooms, and desired amount of Sherry Vinaigrette, tossing to combine. Divide salad among 4 plates. Top each serving with 1 crostino and 1 Poached Egg. Garnish with microgreens, if desired. Serve with remaining vinaigrette.
Recipe by Victoria at https://victoriamag.com/salade-lyonnaise-recipe/