Hot Pineapple Casserole

2 large cans chunk, crushed, or tidbit pineapple, drained, reserve juice
2 c. grated cheddar cheese
1 stick margarine, melted
1 c. splenda/sugar
5 T. flour
1 c. crushed Ritz crackers

Spray 9x13 dish. Pour in pineapple. Combine flour, splenda/sugar, and pineapple juice. Pour over pineapple. Add cheese. Sprinkle crackers over top. Pour margarine over all ingredients. Bake at 350 degrees for 25 minutes. Serve hot.

*Cheese will not melt into casserole