brown and crispy and chop in bits.
3 remove most of the bacon grease, leaving only about 2 tablespoons in the pan.
4 with medium low heat, melt the butter in the oil, then add the flour and stir continuously for about a minute.
5 mix in the milk and water and stir until flour is fully dissolved.
6 melt 3/4 of the grated cheese into the sauce and season with salt and pepper.
7 mix the sauce with the potatoes and top with the bacon bits, green onion and the remaining grated cheese. 