Creamy Mushroom Avocado Carbonara

• 1 tbsp extra virgin olive oil
• 1 brown onion, diced
• 2 garlic cloves, crushed
• 200 g mushroom, thinly sliced
• 1 cup green peas, frozen
• 1 large avocado, peeled and diced
• 2 eggs
• .5 cup milk
• 120 g fettuccine pasta
• .25 cup parmesan shaved