Preheat oven to 350 degrees. Spray a 2 quart casserole dish and set aside. Combine first 5 ingredients in bowl and mix together. Spread pineapple mixture into casserole dish.
In a separate bowl crush Ritz crackers. Pour melted butter and 3 teaspoons of pineapple juice over crackers and mix together. Sprinkle on top of pineapple mixture.
Cook for 35-40 minutes or until brown on top. 6-8 servings.