Well I did quadruple the recipe and though he said it was OK it was very soggy with some almost liquid bits, so I have adapted it a bit.
Here is the recipe I have settled on. It is double your original recipe, so makes 4 servings.
3 tbsp Joseph's sugar free Maple Syrup
4 tbsp (80 grams) Macadamia Nut Butter (made by wizzing macadamia nuts in my food processor)
1/4 tsp xanthan gum
2 tsp cinnamon
1 ounce dried goji berries
Preheat oven to 315
Combine all ingredients (except berries) thoroughly with an electric mixer
Stir in berries
Pour into a baking dish (9"" x 3"" approx)
Bake for 30 minutes
According to my fitday entry, one serving has 247 calories, 20g fat (2 g saturated, 1 g polyunsaturated fat, 14 monounsaturated fat), 7 net carbs, 8 grams protein and 2 grams sugar alcohol (from the sf syrup)
Most of the carbs are from the goji berries, but I think they look and taste like sultanas, and in UK bread pudding always has sultanas or raisins in it.
You could omit the goji berries which would make it only about 2 net carbs per serving.
It turned out a bit overdone so I will turn it over to serve it, so it looks more like traditional bread pudding.
This is what a slice of it looks like.
The original recipe turned out too sweet for my husband's taste, so I omitted the second lot of sweetener completely and lowered the amount of the maple syrup by 1/4, and added more cinnamon