Cook spinach according to packaged directions. Add cooked, drained black beans. Mix together, sprinkling cajun seasoning on top (**I recommend Jamaican Jerk sauce, or I use a South African one called Swazi Mamma Mamba, A Taste of Africa).
Heat tortillas in microwave until warm and soft (about 20-30 seconds, depending on how many and strength of micro.) Sread sauce on tortilla, fill with spinach and black bean mixture.