How to Make It
In a food processor, pulse the bread until coarse crumbs form. In a skillet, melt the butter in 2 tablespoons of the olive oil. Add the breadcrumbs and cook over moderately low heat, stirring occasionally, until crisp, 8 minutes. Season with salt.
In a large straight-sided skillet, heat the remaining 1 tablespoon of olive oil. Add the bacon and cook over moderate heat until crisp; transfer to paper towels to drain. Add the onion, garlic and crushed red pepper to the skillet and cook until the onion is softened, about 2 minutes. Add the cabbage and stock and bring to a simmer. Cook, stirring, until almost all of the stock has evaporated, 8 minutes.
Meanwhile, in a large saucepan of salted boiling water, cook the pasta until al dente. Drain, reserving 1/2 cup of the pasta water. Toss the pasta with the cabbage. Stir in the crème fraîche, the 1/2 cup of cheese and, if necessary, the reserved pasta water; season with salt and black pepper. Transfer the pasta to bowls and garnish with the breadcrumbs, bacon and black pepper. Serve with additional cheese on the side.