Curried Butter Beans

Name: Curried Butter Beans
Prep time: 15 min
Cook time: 25 min
Total time: 40 min
Cuisine: Indian
Ingredients: 2 15 oz can butter beans (drained and rinsed); 2 tablespoons oil; 1 large onion (chopped); 3-4 cloves garlic (minced); 1 inch ginger (grated); 1 14 oz can diced tomatoes; 2 tablespoons curry powder; ½ teaspoon cayenne (adjust as per taste); 1 cup plain yogurt (whisked well until smooth); 2 cups baby spinach; 1 teaspoon salt (adjust as per taste); ½ teaspoon sugar; 2 tablespoon cilantro (optional, for garnish)