Bring a large pot of salted water to a boil.

Add spaghetti or fettuccine and cook according to package instructions until al dente, about 8-10 minutes.

In a skillet, heat olive oil over medium heat.

Add diced chicken and cook until golden brown and cooked through, about 5-7 minutes.

Stir in minced garlic and cook for an additional minute.

In a bowl, whisk together eggs and grated Parmesan cheese.

Once the pasta is done, reserve some pasta water and drain the rest.

Add the pasta to the skillet with the chicken.

Remove the skillet from heat and quickly stir in the egg and cheese mixture.

If the sauce is too thick, add reserved pasta water until desired consistency.

Season with salt and pepper to taste and garnish with fresh parsley.