To prepare raita: Spoon yogurt onto several layers of heavy duty paper towels; spread to 1/2 inch thickness. Cover with additional paper towels; let stand 5 minute Scrape into a bowl using a rubber spatula. Stir in cucumber, 3/4 c tomato, 1/4 t salt and garam masala. Cover and refrigerate.
To prepare vindaloo, combine onion and next 13 ingredients (through pork) in a large bowl; marinate in fridge 30 minute.
Heat large Dutch oven over med-high. Coat pan with cooking spray. Add pork mixture and saute 7 min or til lightly browned. Stir in 1 c tomato. Cover, reduce heat, and simmer 30-60 min or til pork is tender, stirring occasionally. Serve with raita and rice.