Can I make this soup without potatoes?
Yes. Swap potatoes for sweet potatoes, butternut squash, or add 1 to 1 1/2 cups cooked rice at the end. If you want it lower carb, use extra beans and more vegetables.
What vegetables work best?
Stick with a sturdy base like carrots, celery, onion, and something hearty like potatoes or squash. After that, go wild with zucchini, green beans, corn, bell pepper, cabbage, or frozen mixed vegetables. Add quick-cooking vegetables later so they do not turn mushy.
How do I make it taste richer without adding cream?
Three easy upgrades: brown the tomato paste for a full minute, add a Parmesan rind while simmering, and finish with lemon juice or a tiny splash of vinegar.
Can I make it in a slow cooker?
Yes. Sauté the onion, carrot, celery, garlic, and tomato paste first for best flavor, then add everything except the greens and lemon. Cut the potatoes a little larger so they hold their shape on a long cook. Cook on low 6 to 8 hours or high 3 to 4 hours. Stir in greens and lemon at the end.
Is it vegan?
It can be. Use vegetable broth and skip Parmesan, or use a vegan alternative. The soup is still plenty satisfying thanks to the beans and potatoes.
Can I freeze it?
Yes. Just know that potatoes can turn a little softer or slightly grainy after freezing. Still delicious, just a texture thing.