Prepare salmon wrap sauce: Mix crème fraîche with tomato paste and spices. For more tomato flavor, add finely diced tomato or tomato pesto.
Warm one wrap in the microwave for 30 seconds until pliable.
Brush the warmed wrap with salmon sauce.
Fill the wrap with salmon, rocket, tomato slices, mozzarella, and onion rings, then roll tightly.
Prepare tuna wrap sauce: Mix tuna, diced onion, and spices with cream cheese, sour cream, or crème fraîche. Use a mixer to create a smooth cream. Add milk or cream as needed for a spreadable consistency.
Warm one wrap in the microwave for 30 seconds until pliable.
Spread tuna sauce thinly over the warmed wrap.
Fill the wrap with iceberg lettuce, corn, and chives, then add a generous portion of tuna cream on top and roll tightly.
Prepare Mediterranean wrap sauce: Mix pesto with crème fraîche and spices until combined.
Warm one wrap in the microwave for 30 seconds until pliable.
Brush the warmed wrap with sauce.
Fill the wrap with Serrano ham, finely chopped olives, rocket, tomato slices, and mozzarella, then roll tightly.
Cut each rolled wrap in half and serve on plates.
For parties, cut the wraps into quarters instead of halves.