Place the Mastiha (7 piece) in a small dish and freeze for 15 minutes.
Crush the mastiha with a mortar and pestle, or wrap them in a small piece of parchment & crush them with a rolling pin.
In a saucepan over medium heat, add the Water (1/3 cup) and crushed mastiha tears. Simmer for about 5 minutes and then strain the mastiha water through a fine sieve into a small dish
In a medium bowl, stir together Sweetened Condensed Milk (14 ounce), Rose Water (2 tablespoon) and Mastiha Water.
With a standing mixer or hand mixer, whip Heavy Cream (2 cup) on medium high until soft peaks form.
Whisk one third of whipped cream into the sweetened condensed milk mixture.
Fold the remaining whipped cream into sweetened condensed milk mixture. Pour mixture into a freezable container, a loaf pan works nicely, and freeze until ice cream is firm, about 6 hours.
Preheat oven to 350 degrees F (180 degrees C).
Add Raw Cane Sugar (1/2 cup), Almond Flour (1 cup), Salt (1 pinch), Old Fashioned Rolled Oats (1/2 cup), Ground Mahlab (2 teaspoon) and Unsalted Butter (5 tablespoon) to a bowl. Using your hands, mix together until crumbly.
Spread on a baking sheet lined with parchment paper and bake for 8-10 minutes. Let crumbles cool, then serve with ice cream. Garnish with dried rose petals if desired. Enjoy!