Guinness and Black Bean Chili Con Carne

Ingredients

• 1 vidalia onion, chopped
• 3 tbsp olive oil
• 2 tbsp ground cumin
• 1 tbsp dried oregano
• 1 tsp each sea salt and cracked black pepper
• 2 lb lean ground beef
• 2 tbsp smoked paprika
• 2 tbsp chili powder
• 4 tbsp malt vinegar
• 6 tbsp tomato paste
• 2 14oz cans of diced plum tomatoes
• 1 19 oz can black beans
• 1 can Guinness stout or other dark beer
• 2 cups sliced cremini mushrooms
• Steamed basmati rice (for serving)
• 1/2 cup sour cream
• 1 cup grated aged cheddar
• sliced green onions