Recipe Instructions:
                                    
                                    
                                        Ingredients 
olive oil
salt & freshly ground pepper
6-8 ounce tuna steak 
1 red grapefruit
1 avocado
2-4 cups arugula
2-4 tablespoons chopped pistachios
Directions
1. Heat oil in a heavy-bottomed pan.
2. Season your tuna steak with salt and freshly ground pepper and sear it for 2-3 minutes on each side depending on the thickness of the steak and how rare you want it to be in the middle.  
3. Segment the grapefruit, making sure to collect any of the juice that comes out during this process. Here's a  little video I did on how to segment citrus a while back.
4. Halve an avocado and remove the pit. The 8 handled that really well! Using a large spoon remove the flesh of the avocado from its shell and slice thinly.
5. Slice your tuna steak on a diagonal.
6. Dress arugula with olive oil, salt & pepper, and some of the grapefruit juice you accumulated from segmenting the fruit and put on a plate.
7. Layer sliced tuna, avocado and grapefruit segments on top and sprinkle with chopped pistachios.