Foryoueats: Slow Cooker Marinara Sauce

Ingredients

• 2 cans (800g/28oz each can) crushed tomatoes (see notes)
• 1 can (170 g / 6 oz) tomato paste
• 1 medium brown onion (or white or yellow), diced
• 2 garlic cloves , minced
• 2 bay leaves (dried or fresh)
• 1 tbsp brown sugar (or honey)
• 1 tbsp dried basil
• 2 tsp dried oregano
• 2 tbsp olive oil
• 1 tbsp balsamic vinegar
• 1 1/2 tsp salt
• 1/2 tsp black pepper