In a large pot of salted boiling water, cook the fettuccine according to package instructions. Drain and set aside, reserving a little pasta water.
In a large skillet over medium heat, add a drizzle of olive oil. Once hot, add the diced chicken breasts. Sprinkle with Cajun seasoning and cook until the chicken is golden brown and cooked through, about 5-7 minutes.
Reduce heat to low and stir in the heavy cream, mixing well to combine with the chicken. Allow it to simmer gently for a few minutes until slightly thickened. If the sauce is too thick, add a few tablespoons of reserved pasta water to achieve desired consistency.
Stir in the halved cherry tomatoes and let them warm through for another 2-3 minutes.
Add the cooked fettuccine to the skillet and toss everything together until the pasta is evenly coated in the creamy Cajun sauce.
Plate the pasta and garnish with additional Cajun seasoning if desired and serve immediately.
Notes
Garnish with additional Cajun seasoning if desired.