1. 1. Cook the pasta shells according to package instructions. Drain and set aside.

2. 2. In a large skillet, cook the chicken tenders until fully cooked. Remove from the skillet and slice into strips.

3. 3. In the same skillet, sauté the spinach until wilted. Add the cooked chicken back to the skillet.

4. 4. Stir in alfredo sauce, hot red pepper flakes, garlic powder, and onion powder. Mix well to combine all ingredients.

5. 5. Add the cooked pasta shells to the skillet and mix until everything is well coated with the sauce.

6. 6. Sprinkle mozzarella and cheddar cheese on top of the pasta mixture. Cover with a lid and let it sit for a few minutes until the cheese melts.

7. 7. Serve hot and enjoy!