Sample recipe from Entertaining: Boston baked beans

I have eaten many kilos of baked beans throughout my life, but while I have made other kinds of bean dishes, I have never tried making baked beans. This is a variation of a classic American recipe.

500 g (1 lb) haricot beans (navy beans)
350 g (12 oz) streaky bacon, chopped
3 onions, chopped
2 tsp mustard powder
1 tbs brown sugar
2 tbs black treacle
1 142 g (5 oz) can tomato purée
Salt and pepper

Rinse the beans, cover with cold water and soak overnight. Drain, cover with fresh cold water and bring to the boil. Cook rapidly for 10 minutes, the drain. (This looks like an attempt to degas the beans).

Put beans, bacon and onion in a casserole dish and add water to cover. Stir in the remaining ingredients and season with 2 tsp salt, and pepper to taste.
Cover and cook on the oven at 150°C (300°F) for 5-6 hours, stirring occasionally and adding more water if necessary.

The books claims this makes 20 servings.