Preheat the oven to 400°F (200°C).

Cook the noodles according to package instructions.

Drain and set aside.

In a small pan, melt the butter over medium heat.

Add the slivered almonds and toast until golden brown, being careful not to burn them.

Once the almonds are browned, add the lemon juice and poppy seeds to the pan.

Stir well to combine.

Place the cooked noodles in an oven-proof casserole dish.

Pour the melted butter, almonds, lemon juice, and poppy seed mixture over the noodles.

Toss gently to coat the noodles evenly.

Sprinkle with a dash of cayenne pepper and salt to taste.

Bake in the preheated oven for 20 minutes or until the noodles are heated through and slightly crispy on top.

Serve hot as a delightful side dish with your favorite main course.