Sauté first 5 ingredients in hot oil in a skillet over medium-high heat 5 minutes or until vegetables are tender. Add cumin and oregano; sauté 2 minutes.
Stir in wine; reduce heat, and simmer 10 minutes or until liquid is reduced by half. Add beans, and cook until thoroughly heated. Add spinach; cook 2 minutes or until spinach wilts. Serve in warm tortillas with cheese, if desired.