This is very easy and elegant. If you've never had ventresca, it's like premium tuna fish, but buttery and tender--one of my favorites. La Tienda sells ventresca bonito del norte, fatty albacore, which in Spain is considered to be the best. You can sometimes find tins of ventresca de atún claro, regular fatty tuna, at gourmet food stores, such as at World Market. Both types are fantastic.
Salad greens of your choice, carefully washed and dried
a tin of ventresca bonito del norte, or ventresca de atún packed in olive oil
Toss the greens with a little good olive oil until just coated. Add a pinch of salt and toss again. Place the strips of ventresca over the greens and drizzle the olive oil from the tin over the salad.