3 summer squash pistou Recipes

unsalted butter , cut into pieces, onion , halved lengthwise and thinly sliced crosswise, salt, yellow summer squash, halved and thinly sliced, carrots, thinly sliced, yellow-fleshed potato (1/2 lb), peeled, halved, chicken stock or reduced-sodium chicken broth, loosely packed fresh mint leaves, loosely packed fresh flat-leaf parsley sprigs, scallion, chopped (1/2 cup), extra-virgin olive oil, water, salt

olive oil, onion, chopped, carrots, chopped, leeks, white and light green pars only, thinly sliced, garlic cloves, minced, stalk celery, chopped, dried thyme, salt, fresh ground black pepper, dry white wine, chicken stock or 6 cups vegetable stock, new potatoes, quartered, navy beans, drained and rinsed, asparagus spears, trimmed and sliced, summer squash or 2 zucchini, chopped, chopped baby spinach, frozen peas, thawed, fresh lemon juice