Cook macarani in salted boiled water for 10 - 12 minutes.

In a large pan, heat butter in a medium heat; add bacon and saute for 5 minutes until almost crispy.

Add shallot, still occasionaly until they begin to soften for 1- 2 minutes.

Add peas and cook for further 3 minutes

Add half and half. Season with salt and pepper

Simmer gently until slightly thickened, about 2 minutes

Drain pasta, reserving 1/2 cup of the water. Add pasta to the sauce; toss to combine, adding a little bit of the reserved pasta water at time, only if that necessary

Serve in individual bowls and sprinkle some freshly grated parmesan on top

Enjoy