Mini apple crumble cakes

• unsalted butter, to grease

Crumble topping

• 100 g blanched almond
• 100 g plain flour (see Tips)
• 100 g unsalted butter, chilled, diced
• 60 g white sugar

Apple layer

• 400 g Granny Smith apples, peeled, cored and sliced (0.5 cm - see Tips)
• 40 g freshly squeezed lemon juice
• 80 g white sugar

Cake

• 150 g white sugar
• 150 g unsalted butter, cut into pieces
• 3 eggs
• 150 g self-raising flour (see Tips)