Super Simple Keto Chili

Name: Super Simple Keto Chili
Prep time: 10 min
Cook time: 15 min
Total time: 25 min
Cuisine: American, Mexican
Ingredients: 1 tbsp ghee or butter (15 ml); 1 small yellow onion, finely diced (70 g/ 2.5 oz); 1 large stick celery, diced (64 g/ 2.3 oz); 2 cloves garlic, minced; 450 g ground beef (1 lb); 1 medium red bell pepper, diced (120 g/ 4.2 oz); 1 tsp medium chilli powder, or to taste; 1 tsp ground cumin; 1 tsp dried oregano; 1 tin chopped tomatoes (400 g/ 14.1 oz); 2 tbsp unsweetened tomato paste (30 g/ 1.1 oz); sea salt and ground black pepper, to taste; 2 tbsp chopped cilantro (coriander), plus more for topping; 2 tbsp extra virgin olive oil (30 ml); Optional: sour cream or full-fat yogurt, sliced avocado and/or lime wedges