Recently I had an idea that would resolve all that. I would blend the can of chipotles, seeds and all, and freeze portions of it in an ice cube tray. Then I thought, why not add a few more ingrediants to dilute the spicy heat and enhance the flavor. The idea worked very well; the result is sort of a smoky sriracha sauce. I refrigerated the sauce in a jar rather than freezing it. I plan to use it today to flavor some mayonnaise for a chicken sandwich. Here's the recipe.
1/2 onion, chop and saute in a little canola oil, let cool
6 cloves of garlic, roast at 400 degrees
1 7 oz can of chipotle in adobo sauce
1 4.5 oz can of chopped green chiles.
Dump everything in a blender and blend well, remove to a sauce pan, let the mixture boil for a few minutes, then cool and refrigerate in glass jar with a tight lid. Being lazy, I used a can of chiles, but a couple of de-skinned fresh poblano peppers might make it more tasty.