cook the vegetables
Add olive oil to a large pot and set over low heat. Add the diced onion, diced carrot, and finely chopped celery, spring onion, and garlic. Season with thyme and bay leaf. Cook for about 8 - 10 minutes over low heat for the vegetables to soften, stirring occasionally.
cook the pasta
In a separate pot filled with salted boiling water, cook the macaroni. Follow the instructions on the package to cook the pasta al dente.
add the green vegetables
Cut the leek into smaller pieces and add it to the minestrone. Cook for 5 minutes, then add the torn kale and peas. Pour in the water, season with salt and pepper, and continue to cook for 5 minutes.
Cook and serve
Now add the cooked pasta, drained beans, and spinach. Cook for 2 - 3 minutes. Discard the bay leaf. Season to taste with salt and pepper, and drizzle with lemon juice. Stir, divide between four plates, and serve.