Preheat oven to 400 degrees F. Grease a 9 x 13 casserole pan.
Combine quinoa, pasta sauce, shredded carrots, and seasonings and mix until fully incorporated. (I usually mix it all together right in the sauce pan I used to cook the quinoa.)
Pour one-third of the quinoa mixture into the greased pan. Use the back of your mixing spoon to level out the mixture.
Sprinkle cooked sausage and half of the cheese evenly along the mixture. Pour remaining mixture over the sausage and cheese and smooth out with the back of your spoon.
Top with sliced tomatoes and fresh basil and sprinkle the top with remaining cheese.
Bake for 20 minutes. Broil for 2 minutes longer or until cheese is lightly brown.
Remove from oven and let cool for 10 minutes before serving.