Folded Cheese Omelette with Bacon and Avocado

Name: Folded Cheese Omelette with Bacon and Avocado
Prep time: 7 min
Cook time: 15 min
Total time: 22 min
Cuisine: American
Ingredients: 4 medium eggs; 4 bacon rashers (strips) (unsmoked); 1 avocado (peeled and sliced); 1 spring onion (green onion) (finely chopped); 1 tbsp fresh chives (finely chopped); 1 tbsp unsalted butter; 1 tbsp extra virgin olive oil; 80 g cheddar cheese (grated); salt and pepper to season