Wash the tomatoes, grate them dry and cut them into slices. Put them on a baking tray covered with baking paper. Sprinkle with thyme and sugar and sprinkle with some olive oil. Bake in a preheated oven (electric cooker: 100 °C/ convection oven: 75 °C/ gas: see manufacturer) for about 2 hours. Leave to cool. Remove thyme
Melt the butter. Crumble the crackers and mix with the butter. Spread the crumble mixture over 6 starter rings (approx. 5 cm ∅) and press down on the base
Wash the chives, shake dry and cut into fine rolls, except for the tips. Mix the cheese with a fork, season with paprika and salt if necessary. Stir in chives
Now alternate layers of tomato slices and cheese-chives mixture on the cracker bases. Cover and chill for at least 2 hours. Remove from the moulds and garnish with chives