http://christinasadventures.com/2014/01/overnight-steel-cut-oats.html --- original recipe (I halved it and don't toast them in oil either).
This much lasted me 3 mornings + Andy and the kids ate some in there too:
2 1/2 cups water
1 cup cut oats
1/2-1 cup milk
Combine oats and water. Bring to rolling boil. Remove from heat, cover with tight fitting lid. Let sit over night. In morning, uncover and place over medium heat. Add milk to desired consistency. I think I added 1/4-1/2 cup of milk the first morning and just add a little more each morning to reheat.
My toppings include any of the following: honey, almonds or walnuts or peanut butter, bananas or blueberries. I just started adding vanilla extract to them too. Yum! This morning I added 1/2 scoop of protein powder. It made it taste like a shake to me, so I didn't really like it, but Andy did.
Sometimes I cook quinoa in with the cut oats. My friend was telling me the other day that when hers are about done cooking, she whisks in a few egg whites really quick. She said you can only see small white specks of egg, but I guess it makes them really fluffy.