I came up with another yummy variation of this:
1 14.5 ounce can of diced tomatoes (with onion and roasted garlic), undrained
1 14.5 ounce can of diced yellow tomatoes, undrained
1 'brick' of frozen chopped spinach (I think it's 10 ounces)
1 15 ounce can low-sodium black beans, rinsed
Granulated garlic to taste
Dried minced onion to taste
Spices/seasoning to taste (I used Italian seasoning)
Put first four ingredients in a pot over medium heat, stirring to help break up the spinach brick. Once the spinach is broken up, add the rest. Put on low heat, covered, for about 10 minutes.
Serve over pasta or spaghetti squash. Yum!