Preheat the oven to 200°C/390°F. Next, cut your veggies; slice the leek, and mushrooms, and roughly chop the broccoli.
Now, slice the chicken into bite-size pieces. Season with salt and pepper.
Prepare the pasta; bring a pot of salted water to a boil. Add the pasta and cook according to package directions.
Heat olive oil in a large skillet over medium-high heat. Then, add the seasoned chicken. Cook the chicken for 6-7 minutes or until cooked through. Remove the chicken from the skillet and set aside.
In the same skillet, add leeks, mushrooms, and broccoli. Cook the veggies, stirring for 5-6 minutes.
Drain the pasta and add veggies into the pot with the pasta along with the cream, chicken, mustard and half the grated cheese. Stir well to combine.
Transfer the pasta to a baking dish and top it with the remaining cheese. Bake the pasta for 20 minutes.
Notes
Step-by-Step Photos: My blog post includes helpful step-by-step photos to help guide you through making this recipe.Substitutions & Variations: I have included a list of these in the post above.To Store: Store in an airtight container in the fridge for 3-4 days. Reheat in the microwave.To Freeze: Freeze for up to three months in an airtight container. Thaw in the fridge overnight and then reheat in the microwave.Tip 1: You can turn this dish vegetarian by swapping the chicken for tofu or even leaving it with just vegetables.Tip 2: If you don't care for the cheese crust that comes with baking, you can get everything warm and cooked in the pot and serve it up that way.Tip 3: Mix this dish up by playing around with flavours and vegetables! You can get the same delicious base, but with some different flavours and sneak it into the meal rotation more often!