BERRY BANANA VANILLA FRENCH TOAST

INGREDIENTS FOR ONE SERVING:

2 thick slice bread;
1 egg,
1/4 cup milk,
2 tablespoons butter,
1/2 teaspoon vanilla extract,
1 banana, peeled,
1/3 cup berry jam (mixture of blueberries, raspberries, strawberries in this case)
1 teaspoon powder sugar;