Heat oven to
350F (175C). Butter a 8-cup (2-liter) casserole. Heat 2 tbsp butter in
medium saucepan. Add green pepper and onion and cook gently until onion
is very lightly browned, stirring. Sprinkle in flour, salt and pepper
and stir to blend. Remove from heat and add chili sauce and water. Stir
to blend. Return to moderate heat and cook until thickened, stirring
constantly. Stir in cooked turnip. Pour into prepared casserole.
Sprinkle with cheese. Bake about 20 minutes or until cheese is melted
and mixture is very hot.