Cook linguini to al dente according to package instructions

In a nonstick skillet, heat olive oil over medium-high heat

Once the oil is hot, add chicken to the pan and season with cajun seasoning and salt

Allow chicken to brown for 3-4 minutes

Once the chicken starts to brown, add onions and tomato and stir

Allow the onions and tomato to soften for a minute or two

Add evaporated milk and season with garlic powder, salt, and cajun seasoning to taste

Turn to the stove to medium-low and add parmesan cheese, cream cheese, scallion, and lemon juice

Stir well and allow the sauce to thicken for about 5 minutes

Taste the sauce and ensure seasonings are to your liking, sauce is done when it has thickened and is creamy

Remove linguini from the water, reserving a cup of pasta water for the sauce should you need to loosen it a bit

Add cooked linguini to the sauce and stir to incorporate

Turn off the heat and add the mozzarella cheese to the top of the pasta and cover with a tight-fitting lid allowing the cheese to melt and pasta to soak up the sauce

After about 3 minutes the cheese is melted and the pasta is ready to serve