Defrost the frozen mussels. Rinse salmon, dab dry and sprinkle with 2-3 tbsp. lemon juice.
Mix 3 tablespoons lemon juice, salt, pepper and a little sugar. Fold in 3 tablespoons of oil. Wash and dice the tomatoes. Clean and wash spring onions and cut into rings. Wash and roughly chop the mint. Mix into the marinade.
Cut the bacon in half crosswise. Rinse mussels, dab dry and season with pepper. Wrap 1 piece of bacon around each mussel. Spread salmon chops thinly with 1-2 tbsp. oil. Season with pepper.
Grill the salmon for 3-4 minutes on each side. Season with salt. If necessary, grill the mussels in a grill tray all around for about 5 minutes. Serve with: e.g. aioli.