Homemade baked beans recipe

Ingredients

• 1 tbsp sunflower oil
• 1 onion
• 250 g canned beans such as butter or small white beans
• 1 tsp powdered mustard
• 1 tsp molasses
• 225 g can chopped tomatoes
• 1 tbsp tomato paste
• 1 tsp dark brown sugar
• 250 ml low-sodium vegetable stock