Preparation (basil oil)
To make basil oil, put all the ingredients in a high saucepan and let it boil for 6 minutes. After 6 minutes, remove the pan from the heat, and mix the brew for 4 minutes using a hand mixer or blender at full power. Sieve the oil in a ball sieve with a cloth and let the oil drain over a bowl. Afterward, keep the oil in a closed bowl or bottle or store it in your freezer.
Preparation (oysters)
Open the oysters and carefully remove them from their shells. Rinse the oysters in plenty of water and clean their shells. Cut them into 4 pieces and put the oysters in a mixing bowl. Add the tomato cubes, cherry tomatoes, thinly sliced shallot, watermelon, and sushi vinegar to the mixing bowl. Season the mixture with black pepper and fine sea salt, adding the finely chopped chives at the end. Take your basil oil and stir in your finely chopped glasswort. Put the empty oyster shells on a stable surface (tip: a bowl of coarse salt makes a perfectly stable surface). When preparing the oysters, divide the oyster mixture into the empty shells, topping it off with the glasswort-basil oil mixture. As a finishing touch, arrange the cucumber slices along the side of the oyster shells and garnish with a few young basil leaves, bronze fennel, and short in sushi vinegar-marinated shallot rings. And your scrumptious masterpiece is done!