This is something that my mom made all the time but I don't know where it's from. It's one of my favorite meals, and it is EASY!
2 T margarine
2 T flour
1 cup milk
1 can tuna, drained
Salt & pepper, to taste
In a large saucepan over medium heat, melt margarine. Add flour and stir until the butter and flour are well combined. Pour in milk, stirring constantly as it thickens, about 10 minutes. Add drained tuna. Season with salt and pepper.
Serve over toasted and buttered bread.
Serves 2. (We triple it.)