Pour olive oil into pressure cooker and heat.

Add garlic and onions and stir until onions are translucent. Add herbs then add the mushrooms and stir until mushrooms are coated.

Add sweet potato, potato, cauliflower, broccoli, peas, corn and carrots and stir until all vegetables have a light coating of oil.

Drain and add can of butter beans and can of three bean mix then add the can of tomatoes. Add stock to required level in pressure cooker.

Place lid on pressure cooker and cook for 20 - 25 minutes.