For Banana Surprise, first preheat the oven to 180 °C (gas mark 4). Peel the bananas and cut them into 2 1/2 cm pieces. Put them in an ovenproof dish and pour the lemon juice over them.
Lightly toast the almond kernels under the heated broiler for 5-10 minutes. Sprinkle over the bananas. Cook in oven for 15 minutes with lid on.
Mash tofu and blend with apple juice until smooth. Empty the tofu mixture over the bananas. Garnish Banana Surprise with lemon slices and serve immediately.