From Genius Kitchen
The Saag that you see on the menu in Indian restaurants is typically made with spinach, but chard is an excellent substitute! If you enjoy your saag a bit more on the rich and decadent side, adding a splash of cream does just the trick. 
1bunch chard, cleaned, stems removed
8 tablespoons vegetable oil or 8 tablespoons ghee (clarified butter)
2 medium onions, minced
2 tablespoons vindaloo curry paste
1⁄2 cup water
2vgarlic cloves, minced
2 inches ginger, minced
- Finely chop chard leaves and set aside. 
- Heat oil or ghee in heavy bottomed saute pan at med-high. When oil is hot, add onion (be careful, as the oil may splatter) and sauté until transparent. Add chopped chard and let wilt. Add vindaloo and reduce heat. 
- Simmer covered, stirring occasionally, for 10-20 minutes or until desired consistency is reached. If you find the mixture is getting dry, add water. 
- After simmering, raise heat and add garlic and ginger. Stir and heat for 5 minutes. 
- Serve with Naan bread and/or basamati rice. 
(NOTE: If you want to add paneer or potatoes, etc, fold them into the mixture along with garlic and ginger).