Absolutely, assuming you steeped that base grain between 148F and 158F (roughly) that would be considered a partial mash, and a great way to add fresh malty flavor and aroma. If you can use only 1#, I'd recommend not reducing the LME this first time, since you have no idea how effective you'll be at rinsing any sugars from the partial-mash grains. You won't raise your OG out of whack. BSmith will calculate the strike water temps for you. I used to heat the water in the 5-gallon pot on the stove to that strike temp, add grains, and then put into a preheated oven at about 170F. That kept it around 153F fairly well.