Clean and quarter the tomatoes. Wash the spring onions and cut into rings. Peel and roughly chop garlic. Roughly crumble the sheep`s cheese. Mix everything together.
Preheat the oven to 200 ° C. Rinse the fish fillets with cold water, pat dry and drizzle with lemon juice. Season with salt and pepper.
Grease aluminum foil on one side with olive oil. Rinse the thyme and shake dry. Place the fillets one at a time on a piece of foil. Spread the cheese and vegetable mixture on top and cover with the sprigs of thyme. Wrap in the foil, close the edges well. Cook in the hot oven on the middle rack at 200 ° C for about 30 - 35 minutes.
It goes best with baked ciabatta and a dry white wine.