3 summer parsley 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

asparagus spears (about 6 oz), trimmed and cut into 1/2-inch pieces, fresh fava beans, sugar snap peas, fresh basil leaves, loosely packed, extra-virgin olive oil, shallot, finely chopped, vegetable stock or canned vegetable broth, fine sea salt, freshly ground black pepper, mixed herbs such as chervil , chives, oregano, and parsley, coarsely chopped