Fill pasta pot with hot water, bring to a boil.
Trim checken breasts into 1" x 2" strips.
Cook tortellini according to package directions.
Pour tomatoes into a large skillet.
Add chicken strips and garlic, cook, covered, over medium-high until full cooked, about 8 minutes.
Add spinach, cover for 3 minutes.
Stir and cover skillet until spinach is wilted.
Mix with cooked tortellini.