Put all of the sauce ingredients in a medium saucepan and mix to combine. Bring to a simmer and let it reduce for 10-15 minutes. If you want it to be thicker, let it simmer longer.
Heat a grill to medium high heat. Grill the tenderloins until they are brown on all sides. Reduce the heat (or move away from the coals), and allow to cook until the internal temperature is 140°.
Brush exposed sides with the sauce, then turn to brush the other side. Remove from the grill when the internal temperature is 145°.
Let rest 5-10 minutes before slicing. Top the slices with the sauce and serve immediately.
Refrigerate any unused sauce and try it with chicken or fish!
Notes
Chipotles in Adobo come in small cans, but it's hard to use all of a can for one recipe. Those things are spicy, man! So put remaining chipotles in a glass jar or bowl and refrigerate. They will stay good in the fridge for a very long time so you can use them for other dishes!
Tips to make Chipotle Berry Pork Tenderloin healthier:
To reduce the sugar content, use fruit spreads that have no added sugar. Here's a link to a raspberry one and a cherry one imported from France!
To further make this more sugar free, I've created it with coconut sugar rather than brown sugar.
Buy the Roland Chipotle Peppers in Adobo. They are the only brand I found that has no wheat (gluten-free), no canola or soybean oil (I'm picky about my oils!), and only a small amount of sugar (3 grams).
There's no substitute for the molasses in terms of flavor. Besides, it's full of iron and there's only 2 Tablespoons for the entire recipe.