To prepare a veggie curry casserole recipe, you'll need: 1 1/2 cups chopped onions, 1 cup chopped celery, 2 tablespoons each chopped garlic and ginger, and 1 teaspoon each ground cumin and coriander. 2 cups diced tomatoes, cut into quarters. 1 tablespoon each kosher salt and ground black pepper. 1/2 cup shredded cheddar cheese. 4 cups water. Bring to boil over medium heat. Reduce heat to medium-low and simmer until cheese is melted and sauce is bubbling, 20 to 25 minutes. Remove from heat and stir in sour cream. Serve warm.