Instant Pot Minestrone Soup

• 1 small onion (, about 1/3 cup, diced)
• 2 cloves garlic (, minced)
• 1 medium carrot (, about 1 cup, chopped)
• 1 large celery stalk (, about 1 cup, chopped)
• 2 teaspoons dried basil
• 1 teaspoon dried oregano
• 3/4 teaspoon dried thyme
• 1 32-oz can diced tomatoes (, I usually use fire-roasted or Italian-style)
• 3 tablespoons tomato paste
• 1 bay leaf
• 32 ounce carton (, 4 cups low sodium vegetable broth)
• water - add only as much as needed to cover vegetables
• 1/2 cup dry uncooked small shell pasta
• 1 medium zucchini (, around 2/3 cups, sliced into halves or quarters)
• 1/2 cup canned or cooked red kidney beans (, drained and rinsed)
• 1/2 cup canned or cooked cannellini beans (, or great northern beans, drained and rinsed)
• 1-2 cups fresh baby spinach (or kale) (, chopped (optional))
• 1/2-1 teaspoon balsamic vinegar (, optional but adds great flavor)
• Shredded or grated Parmesan cheese (, for serving)
• Fresh parsley (, finely chopped, for garnish (optional))
• Instant Pot (, I have a 6 Quart DUO-Plus)

Directions