Preheat your oven to 180°C (350°F). This will ensure your dish bakes evenly and comes out perfectly golden.
Wash and chop the broccoli into small florets. Steam them for about 5 minutes until they are bright green and tender.
In a skillet, heat a tablespoon of olive oil over medium heat. Add diced chicken breast and cook until golden brown and cooked through, about 7-10 minutes.
In a saucepan, melt 2 tablespoons of butter. Stir in 2 tablespoons of flour to create a roux. Gradually whisk in 2 cups of milk until smooth. Add 1 cup of shredded cheese and stir until melted.
In a large bowl, mix the steamed broccoli, cooked chicken, and cheese sauce. Season with salt and pepper to taste.
Carefully fill each pasta shell with the broccoli and chicken mixture. Place them in a greased baking dish.
Sprinkle additional cheese on top of the filled shells for that extra cheesy goodness.
Bake in the preheated oven for 25-30 minutes until bubbly and golden on top. Enjoy the delightful aroma!
Let the dish cool for a few minutes, then serve warm. Enjoy your Coquilles de brocoli au poulet au fromag with family and friends!