With a spatula, gently coat the trout fillets evenly with mustard. In a small bowl combine the bread crumbs and all the herbs together. Dredge the fish in crumb mixture.
In a large skillet at medium heat melt the butter, stir occasionally for 2 to 3 minutes or until the butter turns light brown. Add the fish to the pan cook approximately 1 1/2 minutes on each side and remove to a plate, keep warm.
In a clean large skillet at high heat saute the garlic and chili flakes in the oil, do not burn the garlic, then quickly add the spinach and toss around to prevent the garlic from burning. Cook only until wilted, season and remove to a towel to absorb excess water.
Recipe courtesy of Gourmet Magazine