Tuna Au Gratin

1 (9 ounce) Can tuna
1/2 Cup cottage cheese
5 Slice bread, cubed
2 Tablespoons butter
3 Tablespoons flour
1 Teaspoon paprika
1 1/2 Cups milk
1/2 Cup cheddar cheese, shredded
2 Tablespoons melted butter

Preheat oven to 350 F. Combine tuna cottage cheese and half the breadcrumbs. Spread tuna mixture in bottom of casserole. In saucepan, combine butter, flour and paprika to a smooth paste. Gradually heat and add milk, stirring until thick. Add cheese; stir until melted. Pour sauce over tuna. Top with remaining breadcrumbs. Pour melted butter over breadcrumbs. Bake 25 to 30 minutes at 350 F.