Creamy tuna mornay

Name: Creamy Tuna Mornay
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4
Ingredients: 425 g Canned tuna in springwater; 1 Carrot; 2 Celery sticks; 440 g Corn, canned; 2 tbsp Curly parsley, fresh; 1 Onion; 375 ml Carnation light & creamy evaporated milk; 1 tbsp Wholegrain mustard; 1/3 cup Plain flour; 1 pinch Salt and pepper; 60 g Butter; 1 cup Tasty cheese, grated; 1 Red capsicum diced