Here's an idea that I tried recently, and it turned out deliciously! When I make mashed potatoes, I use a hand mixer to "mash" them to ensure no lumps. Just before this mixing recently, I put in 1 deseeded chipotle pepper (I used the kind that is canned in adobo sauce.) for every 2 potatoes. It gave the potatoes a smoky flavor with a mildly spicy kick. YUM!
Here's another idea I haven't tried yet: using these chipotle mashed potatoes to top a vegan pot pie or shepherd's pie. If you try it, let me know how it turns out!