Step 1

Saute onions: Add olive oil and onions to an Instant Pot. Turn on the saute setting for 10 minutes, and cook, stirring only occasionally, to allow the onions to brown around the edges (see note 2).

Step 2

Add aromatics: Add the garlic, Italian seasoning, red pepper flakes, and salt. Saute for 1 more minute, or until garlic is fragrant.

Step 3

Pressure cook: Add carrots, celery, potato, beans, roasted red peppers, and vegetable stock. Stir well to mix. Pressure cook on high for 25 minutes. Allow the Instant Pot to natural release for 15 minutes, then release all pressure (see note 3).

Step 4

Finish seasoning: Stir in spinach and lemon juice. Taste and adjust seasonings (more salt and/or lemon juice, if needed). Ladle into bowls.