01 -
Lightly grease three 150mL pudding molds with a drop of oil, wiping away any excess with a paper towel.
02 -
Juice the grapefruit and combine with grapefruit zest in a small saucepan. Heat until warm (do not boil) to extract flavor from the zest. Remove from heat and let infuse for 10 minutes.
03 -
Strain the juice mixture through a sieve, pressing to extract all juice. Measure out 150mL of juice. Taste and sweeten with sugar or honey if desired.
04 -
Bloom 3/4 tsp gelatin in 1 tbsp cold water. Microwave in 10-second bursts until melted. Whisk some warm grapefruit juice into the gelatin, then incorporate back into the remaining juice, whisking until smooth.
05 -
Divide the grapefruit mixture among the three prepared molds, 50mL in each. Refrigerate until set, at least 1-2 hours, before adding the panna cotta layer.
06 -
For the panna cotta, combine milk and cream in a small saucepan and heat until steaming. Roughly chop the rosemary leaves, add to the milk mixture, stir briefly, then cover and let steep off heat for 30 minutes.
07 -
Strain the milk mixture and discard rosemary. Stir in 25g honey or adjust to taste. Bloom 1 1/2 tsp gelatin in 1 tbsp cold water, then microwave until melted.
08 -
Stir some of the rosemary-infused milk into the melted gelatin until smooth, then incorporate back into the remaining milk. Pour 100g of mixture over each set grapefruit jelly layer.
09 -
Refrigerate until fully set, preferably overnight.
10 -
To serve, dip the bottom of each mold in just-boiled water for 5-10 seconds (shorter for thin-walled molds, longer for thick-walled ramekins). Run a knife around the edge and invert onto a serving plate.