Instant Pot® Tuscan Stew

Combine navy, kidney, and black beans in a multi-functional electric pressure cooker (such as Instant Pot®) with 6 cups water. Close and lock the lid. Select high pressure according to manufacturer's instructions; set timer for 27 minutes. Allow 10 to 15 minutes for pressure to build.

In the meantime, heat olive oil in a large stockpot over medium-high heat. Saute onion, carrots, and celery until onion is translucent, about 5 minutes. Add garlic and saute until fragrant, about 1 minute. Add flour and stir until well coated. Pour in stock and water. Add kielbasa, salt, pepper, parsley, basil, thyme, and bay leaf. Bring to a boil; reduce heat and simmer for 10 minutes.

Release pressure on the beans using the natural-release method according to manufacturer's instructions, 10 to 40 minutes. Drain.

Bring stew back to a boil. Add the beans and orzo. Boil until orzo is soft and flavors come together, about 9 minutes. Remove from heat and let cool slightly before serving.