Mixed berry crumble with almond praline

Ingredients

• 300 gram mixed frozen berries
• 6 ripe pears, peeled, cored, chopped
• 810 gram can plums, drained
• 1 teaspoon vanilla extract
• 2 tablespoon caster sugar, plus 3/4 cup (165g) extra
• 2 tablespoon cornflour
• 1/3 cup (75g) firmly packed brown sugar
• 1/3 cup (50g) plain flour
• 2 tablespoon self-raising flour
• 80 gram unsalted butter, cold, cubed
• 1/3 cup (55g) blanched almonds
• vanilla ice-cream, to serve