Easy black bean burritos with wilted spinach

I make black bean burritos when I am short on time.  These burritos are budget friendly, easy to prepare and very filling. 

Prep time:  About 10 minutes
Cook time: 20 minutes
Serves: 2 - 4

You will need:
2 table spoons olive oil
1 15 oz can of black beans
1 cup of diced onion
Large flour tortillas
2 cups shredded Mexican blend cheese
1 package of fresh Spinach
1 teaspoon of ground Cumin
Salt

Heat oil in a skillet on medium-high heat. Add onion and saute for 5 minutes. Stir in cumin, add amount of salt desired and cook 1 minute more. Next, add black beans and bring to a boil, then reduce heat and simmer for 15 minutes.  Stir in fresh spinach (about 2 handfuls) and cook until wilted. Fill the warm tortilla with the bean mixture and top with shredded cheese. Wrap and enjoy!  Serve with a side of chips and salsa.