Creamy Italian Sausage and Tortellini

Italian sausage (I used mild, but it typically comes in differing degrees of heat)

diced tomatoes with Italian seasoning

"family sized" container of cheese tortellini. 

bag of fresh baby spinach, stems removed and rough chopped

box (4 cups) chicken broth

block of reduced fat cream cheese

cold water + 1 Tbsp cornstarch

dried basil and oregano