Heat up a pot of water. Once boiling, cook the pasta.
While heating the water, spray (or spread) a large skillet with cooking spray or oil. First cook the cup of vegetables, seasoned with salt and pepper, for about 5 minutes. Set aside.
Spray the pan again and cook the diced chicken, seasoned with salt and pepper. Once the chicken is thoroughly cooked, add the vegetables back into the pan.
Sprinkle the mozzarella cheese on top of the skillet. Mix until the mozzarella cheese is just about melted.
Add in the milk. Stir occasionally. The milk should bubble and start to thicken.
After 3-4 minutes, add the cooked pasta. Stir together and cook on heat for another 1-2 minutes.
Remove the skillet from heat and let the dish sit for another 5 minutes. This will allow for the sauce to thicken. Stir occasionally during this process to smooth it out.