Instant Pot black bean soup with dry black beans - add 16 oz. into pot with 4 c water. Cook on high pressure for 25 minutes with 15 min natural release. Drain and then proceed to next steps cutting rest of the ingredients above in half (since you're using half the amt. of beans).
Instant Pot black bean soup with canned beans - Set pot to saute. Add olive oil and onions. Cook until slightly tender, then turn pot off. Add canned or previously cooked black beans, diced tomatoes, broth and seasonings.
Seal lid and steam valve, set to high pressure for 10 minutes followed by a quick release.
Serve topped with queso fresco, fresh cilantro, and/or a lime wedge.