01 -
Bring a large pot of salted water to a boil. Cook the spaghetti according to package instructions until al dente. Reserve 1 cup of pasta water, then drain.
02 -
In a large skillet, heat olive oil over medium heat. Add sliced garlic and sauté for 1–2 minutes, until fragrant and lightly golden. Do not let it burn.
03 -
Add the spinach and cook for 2–3 minutes, stirring frequently, until wilted. Add red pepper flakes if using.
04 -
Add the cooked spaghetti to the skillet. Splash in some reserved pasta water to loosen and help coat the noodles. Season with salt and pepper. Toss well to combine.
05 -
Plate immediately. Top with grated Parmesan cheese and a squeeze of lemon juice for brightness.