Butter substitutes...?

[DZLS]

I've never been a big fan of butter, but when making baked sweet potatos, i like to add some butter for flavor, and don't like mixing fats with my carbs...

i keep my diet to a carb / protien or fats / protien meals...

So any suggestions for a butter substitute that's low fat...? like less than 5g per Tbsp...?