It's fun to make mashes too... when I have a day sometimes I'll go to the bulk barn and buy all kinds of different grains and oats just so that I can make something yummy for my horse.
I love to add apples and carrots to it too, which Nikki always picks out before eating the rest of the mash XD
And I like making warm meals in the winter for my horse too :) A good rule I use is I just add hot water to the feed, mixing until the water is just to say even with the grain. Then I bring it out to the barn. By the time I get to the barn from in the office - a two minute walk - it is usually fully soaked and ready to eat.