Place salmon on a flat work surface
Brush with sunflower oil
Transfer salmon rolls into a glass dish
Top with juice and zest of 1 lime, Season with salt and pepper
Cover with plastic wrap; refrigerate until well marinated, about 2 hours
Place remaining lime juice and zest, chile peppers, 1 tablespoon olive oil, sunflower seeds, and garlic in a food processor
Puree, pouring the rest of the olive oil in gradually, until pesto is blended and thick
Preheat an outdoor grill for medium-high heat and lightly oil the grate
Place salmon rolls on grill. Cook until salmon flakes easily with a fork, 4 to 5 minutes per side
Divide salmon across serving plates; spoon pesto on top