Green Fruit Bowl with Frozen Grapes

Freeze grapes on a rimmed baking sheet for 1 hour.

Meanwhile, make the syrup: Bring water and sugar to a simmer in a medium saucepan, stirring until sugar dissolves. Remove from heat, and add lemon thyme. Let stand, covered, until cooled completely. Strain syrup through a fine sieve; discard solids.

Thinly slice apple. Divide apple, kiwifruits, melon, and grapes among 8 bowls. Pour syrup over tops just before serving.