One-Pot Healthy Tuscan Minestrone Soup

Ingredients

• 300 g (2 cups)finely diced onion
• 150 g (1 cup)finely diced fennel
• 6 mediumcarrots, peeled and diced
• 4 stalkscelery, diced
• 1 teaspoondried chilli flakes
• 1 teaspoondried thyme
• 1 teaspoondried oregano
• 1 teaspoondried basil
• ½ teaspoondried rosemary
• 5 clovesgarlic, chopped
• 1.44 litres (6 cups)chicken stock or vegetable stock
• 1 can (794 g / 28 oz)tomatoes, preferably San Marzano
• 1 can (397 g / 14 oz)cannellini beans or white kidney beans, rinsed and drained
• 130 g (2 cups)fresh kale, finely diced, ribs and stems removed, or spinach
• 2Parmigiano Reggiano rinds (optional)
• 50 g (½ cup)coarsely grated Parmigiano Reggiano, for garnish (optional)

Instructions

1. 1

   Load the slow cooker

   Put the onion, fennel, carrots, celery, chilli flakes, thyme, oregano, basil, rosemary, garlic, stock and tomatoes in the slow cooker. Cover and cook on high for 4 hours or on low for 6 hours.

2. 2

   Add beans and greens

   One hour before serving, stir in the cannellini beans, kale or spinach and Parmesan rinds. Cover and continue cooking.

3. 3

   Serve the soup

   Take out the Parmesan rinds, ladle the soup into bowls and garnish with freshly grated Parmigiano Reggiano.

What is Tuscan minestrone?

Minestrone is an Italian vegetable soup with many regional versions, often built around seasonal vegetables, beans and a savoury broth. This slow-cooker take brings together tomatoes, fennel, carrots, celery and cannellini beans.

The long, gentle cooking gives the vegetables time to flavour the broth, while Parmesan rinds add savouriness as they simmer. Kale or spinach goes in later so it does not spend the full cooking time in the pot.

Nutrition and macros by portion

The nutrition label shows one serving as written: 138 calories, 8g protein, 17g carbs, 4g fat.

The tomatoes, carrots and other vegetables contribute carbohydrates, while the cannellini beans provide both carbohydrates and protein. Most of the fat and additional protein come from the optional Parmesan; stock choice also affects the overall composition. Pair a bowl with a salad or extra vegetables for a fuller plate.

The vegetable base

Aromatics: finely dicing the onion and fennel helps them blend into the broth as they soften. Keep the carrots and celery in similarly sized pieces so they cook at a consistent pace.

Tomatoes: canned tomatoes provide the soup’s tangy, rounded base. San Marzano tomatoes are suggested, but the recipe works with a standard can too.

Herbs and broth

Herbs: thyme, oregano, basil and rosemary build the Italian-style flavour, with chilli flakes lending a gentle kick. Measure the chilli carefully if you prefer a milder soup.

Stock: use chicken stock for the stated version, or vegetable stock for a meat-free option. The Parmesan rinds are optional, and leaving them out also makes the soup suitable for a dairy-free version if you skip the garnish.

Why the beans go in later

Timing: the vegetables and tomatoes cook first, while the beans, greens and Parmesan rinds are added one hour before serving. This gives the greens less time to soften and helps the beans keep their shape.

Greens: remove kale ribs and stems before dicing the leaves. Spinach is an alternative; add it at the same point as the recipe directs.

Check the texture

Vegetables: by the end of the cooking time, the carrot should be tender when pierced, while the vegetables still hold their shape. Slow cookers can vary, so check near the end of the stated time.

Broth: the soup should be hearty but still ladle easily. If the vegetables need more time, continue cooking until they reach the texture you prefer.

Serving ideas

Garnish: grate Parmigiano Reggiano over each bowl just before serving for a salty, savoury finish. The garnish is optional, as are the Parmesan rinds in the cooking pot.

Alongside: serve the soup with crusty bread or a simple green salad for a more substantial meal. Both let the vegetable-rich broth remain the focus.

Recipe notes & tips

• Dice the vegetables evenly so they soften at a similar rate.
• Rinse and drain the cannellini beans before adding them.
• Use vegetable stock and omit both Parmesan additions for a dairy-free version.
• Keep the slow-cooker lid on during cooking to retain heat.
• Remove the Parmesan rinds before ladling the soup.

Variations

• Use spinach: swap it for the kale and add it one hour before serving as directed.
• Choose vegetable stock: use it instead of chicken stock for a meat-free soup.
• Adjust the heat: reduce or omit the chilli flakes for a gentler flavour.
• Add Parmesan: include the optional rinds during the final hour and finish with grated cheese.
• Try white kidney beans: use them in place of the cannellini beans.

Common mistakes to avoid

• Adding the beans too early: they may soften more than intended, so wait until one hour before serving.
• Leaving kale stems in: they can be tougher than the leaves, so remove the ribs and stems before dicing.
• Forgetting the rinds: remove them before serving so they are not left in the bowls.
• Using uneven vegetable pieces: some may turn soft before others, so aim for consistent dice.
• Cooking with the lid off: heat can escape, so keep the slow cooker covered as directed.

How to store

Cool leftovers and refrigerate them in a covered container for up to 3 days. Reheat gently in a saucepan or microwave until piping hot, stirring as needed; add a splash of stock or water if the soup has thickened.

Frequently asked questions