Cook pasta in salted boiling water according to package directions until al dente (slightly firm). Drain and set aside, drizzling with olive oil to prevent sticking. Reserve some of the pasta water for later.
Cut chicken breast into cubes and place in a bowl. Season with ½ of the homemade cajun seasoning.
Heat ½ tablespoon of olive oil in a large nonstick skillet. When hot, add seasoned chicken and cook through on both sides, until tender.
Once the chicken is cooked, remove it from the pan and transfer to a bowl. Set aside for later.
In the same pan where you cooked the chicken, add sliced onion and sliced red bell pepper. Sauté for 1 - 2 minutes.
Add to the sautéd vegetables the milk, the pasta water and the remaining cajun seasoning. Give it a stir and then cover with a lid. Simmer on medium heat for about 5 minutes.
Remove the lid and add to the skillet cooked chicken, cooked pasta, blended cottage cheese (or cream cheese) and the remaining olive oil. Stir to combine, then remove it from the heat. Adjust with salt, pepper and cayenne pepper if necessary.
Serve warm or store for later.