Ingredients
3 tbsp butter
2 tbsp plain flour
2 ½ cups milk
1 can tuna, 6 oz. can, drained, flaked
½ cup grated parmesan, plus ¼ cup extra
1 grated lemon zest
4 ½ cups potatoes, peeled, cut into slices
7 oz. baby spinach leaves, chopped
1 onion, finely sliced
Preparation
Preheat oven to 350°F. Lightly grease an 8-cup baking dish.
In a medium saucepan, melt butter on high. Stir in flour and cook for 1 minute.
Remove from heat and gradually mix in milk until smooth.
Return to heat and cook, stirring until the sauce boils and thickens. Simmer for 3 minutes.
Stir in tuna, parmesan and zest. Season to taste.
Arrange half of the potato slices in a deep baking dish.
Layer with half the spinach and onion, with one-third of the tuna mixture.
Repeat layers, finishing with the tuna mixture.
Cover with foil and bake for 30 minutes.
Uncover and sprinkle with extra parmesan.
Bake a further 15 to 20 minutes until the potato is tender and top is golden. Serve.