Beans with lard and Trois-Pistoles beer - Le Coup de Grâce

Ingredients

• 4 cups small white navy beans, uncooked
• 1/2 cup maple syrup
• 1/2 cup Trois-Pistoles beer from Unibroue, lukewarm
• Water
• 1 medium yellow onion, peeled and sliced in half
• About 250g salted lard (pork belly ), cut in big cubes
• 2 teaspoons dried mustard
• 2 tablespoons tomato paste
• 200ml brown sugar
• 200ml molasses
• 250ml maple syrup
• Lukewarm water
• Salt and ground pepper