Dinner Tonight: Spinach and Chickpea Curry Recipe

Name: Dinner Tonight: Spinach and Chickpea Curry Recipe
Ingredients: 2 1/2 pounds fresh spinach; 2 tablespoons butter; 3 tablespoons canola oil; 4 yellow onions, peeled and chopped; 1 3-inch piece fresh ginger, peeled; 7 cloves garlic, peeled; 2 teaspoons ground turmeric; 3/4 teaspoon ground cumin; 1/2 teaspoon ground coriander; 1/4 teaspoon cayenne pepper; 1 28-ounce can tomatoes, drained and chopped; 2 cups cooked chickpeas, with 1 cup of the cooking liquid; Salt and pepper; Juice of 1 lemon; 1 serrano, stemmed and minced