You wont ruin the nutrients of oats, mostly just looking for fiber and quality carbs--not ruined with cooking.
the problem with cooking is usually involved in draining, but if you think about it, what happens in your stomach? the purpose of amylases is to breakdown the carbs. so it doesnt really matter in that respect. actually if you dont cook them long enough you are going to get really bad tummy aches (possible bad gas--yikes!) because the oats expand and absorb water just like rice. so be careful and cook fully!!
fiber is just passed thru your system anyways...
not to go off on a tangent.
but cooking oatmeal with milk is delish--a few ideas for ya!
mix with protein--vanilla-any fruit and then with some splenda and almonds..
or use vanilla protein, and in the spice section of the grocery store check out pumpkin pie spice, get some of that, and mix with splenda,.
or just strawberry protein and almonds, and its like fruit and cream instant oatmeal...
you can use oatmeal to make really good cheat snacks, like
oatmeal raisin cookies, (cant remember off the top of my head the recipe for that right now, but hit me up if you are interested)
oatmeal apple crisp,
spray oats in spray butter,se aside-- cut up 2 apples into slices, lay flat in a pan, spray down in a little more spray butter, add a teeny bit of no fat yogurt, cinnamon and splenda, mix all together, cover top of oatmeals with the cooked oats and then bake in the oven at 350 for about 20 minutes, switch oven to broil and cook uncovered for about 10 minutes longer to crisp the oats!! yum yum.
good luck, hope that helps!