Cut the pumpkin and corn into pieces, boil the pumpkin half cooked, remove from heat. Boil the corn until cooked, remove from heat.

Peel the potatoes, cut into strips. Sprinkle with salt, fry until cooked, remove from heat.

Heat butter in a roasting pan. Grill vegetables, except potatoes, until cooked.

Tuna mayo cheese sauce: mix and stir well KEWPIE MAYONNAISE ORIGINAL, cream cheese, chopped celery sticks and tuna, stir well.

Prepare a serving plate, arrange all the roasted vegetables. Serve with tuna sauce.