In a large mixing bowl, soak the 500 g white kidney beans in cold water for 8 hours. Make sure the beans are fully submerged in water during the soaking period.
The Cooking
Preheat the oven to 275 °F (135 °C) and drain the soaked beans and place them in the bottom of a cooking pot. Dice the 225 g salted lard (make sure to remove the skin). You can also substitute the lard with smoked sausages.
Chop 1 yellow onion and prepare all the other ingredients for the Traditional Baked Beans [Fèves au lard].
Add the diced 225 g salted lard, 3 Tbsp. molasses, 45 g brown sugar, 1 tsp ground mustard, 2 Tbsp. ketchup, chopped 1 yellow onion and 1 bay leaf to the pot. Season with 2 tsp. salt and 1 tsp. freshly ground black pepper to taste.
Mix the ingredients well. Cover the beans with water, ensuring the water level is about 2.5 cm (1 inch) above the beans.
Bake with a lid for 8 to 10 hours, checking occasionally to ensure the beans remain covered with water.
The Serving
Remove the bay leaf and serve your Traditional Baked Beans [Fèves au lard] with a good breakfast. Any leftovers can be frozen for later use. Bon appétit!