Bring a large pot of generously salted water to a boil over high heat. Once the water is boiling rapidly, add the high-protein pasta and cook according to the package instructions until just al dente. The pasta should still have a slight bite because it will continue softening slightly when reheated later for meal prep. Before draining, carefully scoop out and reserve about ½ cup of the starchy pasta water. This helps loosen the sauce later and keeps the pasta creamy instead of dry.
While the pasta cooks, pat the chicken breasts completely dry using paper towels. Dry chicken helps create better browning and prevents steaming in the skillet. Season both sides evenly with garlic powder, onion powder, smoked paprika, salt, and black pepper, pressing the seasoning gently into the chicken so it sticks properly.
Heat olive oil in a large skillet over medium-high heat until the oil is hot and lightly shimmering. Carefully place the seasoned chicken breasts into the skillet in a single layer. Cook for about 5–6 minutes on the first side without moving them too much so a golden crust develops. Flip the chicken and cook another 5–6 minutes on the second side until fully cooked through and the internal temperature reaches 165°F. Remove the chicken from the skillet and let it rest on a cutting board for a few minutes before slicing into bite-sized strips. Resting helps keep the chicken juicy and tender.
In a blender or food processor, combine the cottage cheese, Greek yogurt, chicken broth, grated Parmesan cheese, Italian seasoning, and red pepper flakes if using. Blend everything together until completely smooth, creamy, and silky. Blending the cottage cheese removes any curd texture and creates a rich sauce that feels much more indulgent while still being high in protein.
Using the same skillet the chicken cooked in, reduce the heat to medium and melt the butter. Add the minced garlic and cook for about 30 seconds, stirring constantly until fragrant. Be careful not to let the garlic brown too much because burnt garlic can make the sauce taste bitter.
Slowly pour the blended protein sauce into the skillet with the garlic. Stir gently and continuously until the sauce is warmed through and smooth. Avoid letting the sauce boil aggressively because high-protein dairy ingredients like Greek yogurt and cottage cheese can separate if overheated. Keep the heat moderate and stir often for the creamiest texture.
Add the cooked pasta and sliced chicken directly into the skillet with the sauce. Toss everything together gently until every piece of pasta and chicken is evenly coated in the creamy sauce. If the sauce feels too thick, stir in a splash of the reserved pasta water a little at a time until the texture becomes silky, glossy, and creamy.
Stir in spinach, broccoli, or any additional vegetables if using. Let the vegetables warm and soften slightly from the heat of the pasta and sauce. Spinach will wilt quickly while broccoli may need an extra minute or two to become tender-crisp.
Divide the finished pasta evenly into meal prep containers and let it cool slightly before placing the lids on top. Allowing the pasta to cool for a few minutes helps prevent excess steam and condensation from building up inside the containers. When reheating throughout the week, add a small splash of broth, milk, or water before warming to help bring the creamy sauce back to life and keep the pasta comforting and delicious.