In a bowl, mix the ground pork with finely chopped onion, finely chopped parsley, egg, breadcrumbs, pepper, and salt. Form balls the size of a golf ball.
Peel the pumpkin and cut into cubes.
Break the cauliflower into florets.
Steam the pumpkin cubes and cauliflower florets until al dente.
Make the mashed potatoes.
Melt butter in a cast-iron pot. Add the flour and let it cook for a moment.
Add half of the chicken broth. Whisk vigorously until there are no lumps and you have a smooth thick sauce.
Pour in the rest of the broth and whisk well until it boils. Add the cream and season.
Add the meatballs to the sauce and let them cook for about 10 minutes.
Carefully add the steamed drained vegetables to the sauce. Let everything heat through well.
Serve the blanquette with mashed potatoes, and garnish with fresh parsley.