01 -
Boil spaghetti in a large pot of salted water according to package directions until al dente; drain thoroughly.
02 -
Heat olive oil in a large skillet over medium heat. Add breadcrumbs and cook, stirring frequently, until golden and crisp, about 3 to 5 minutes. Season with salt and pepper. Transfer to a bowl and set aside.
03 -
Melt butter in the same skillet over low heat, adding one tablespoon at a time until the butter foams. Add minced garlic and cook, stirring often, until fragrant, about 1 minute.
04 -
Add sliced mushrooms and fresh thyme to the skillet. Cook, stirring occasionally, until mushrooms are tender and browned, about 3 to 5 minutes. Season with salt and pepper to taste.
05 -
Place drained spaghetti on plates. Spoon the brown butter mushroom mixture over pasta and sprinkle with toasted breadcrumbs. Garnish with chopped parsley if desired and serve immediately.