Fry Mahi Mahi pieces (or other fish pieces) in 1T of butter and 1T of olive oil for 6 - 10 min. Lightly salt.
Meanwhile, put fresh basil leaves (1c. loosely packed) in food processor with 3 cloves of garlic and juice from 1/2 lemon. Add pine nuts if you have (I didn't, tasted great anyway.) Blend.
Add 2T soften butter to basil mixture. Blend again. Add dash of salt.
The end! Enjoy!