Preheat the oven to 200° C. Unroll the pastry and using a 6 cm round cutter, cut out 12 pastry rounds. Line a muffin tray with the pastry rounds and prick the base of each pastry cup with a fork.
Divide the tomatoes and thyme into the 12 cups.
Whisk together the milk, cream and eggs and season the mixture with salt and pepper. Pour the filling into the cups.
Bake for 20 minutes, turn the heat down to 160° C and bake for a further 10 minutes. Remove and serve with a side salad or as a snack.