Cut the zucchini, clean them, and boil until tender.

Drain and scoop out the centers. Set aside while you prepare the filling.

Pour a little oil into a pot and heat. Sauté the onion until golden.

Add the bell pepper and ground beef, mix, and cook.

Season to taste.

Make the white sauce: Pour a little oil into a pot and heat. Add flour to form a crumbly mixture, then gradually add milk, stirring, until a soft, not too thick, white sauce forms. Add salt, pepper, and grated cheese to taste.

Pour the sauce over the stuffed zucchini and bake for 30 minutes.

Enjoy!