Roasted grape & olive crostini

For ➍-➏*
2 tbs olive oil
1 cup (+/- 100 g) (purple) (seedless) grapes
1 cup (+/- 120 g) (kalamata) olives, pitted
1½ ts finely chopped rosemary, divided (or thyme)
sea salt & red pepper flakes
12 baguette slices, toasted
180 g ricotta (or blue cheese)

Heat oven to 205°C. Combine olive oil, grapes, olives, 1 ts rosemary, a couple pinches of sea salt and pepper flakes in a baking dish or roasting pan. Roast until grapes are wilted and leaking juices, about 35 to 55 m, rolling ingredients around in pan a few times throughout roasting time to encourage even cooking.
Slather each toast with ricotta, then heap each with grapes, olives and pan juices. Finish with remaining rosemary and eat immediately.

*Double ingredients for a small party.