whole wheat spaghetti • sardines packed in olive oil, lightly drained and broken into bite-sized pieces • cannellini beans, drained and rinsed • garlic, minced • extra-virgin olive oil (or use some of the sardine oil) • lemon zest • lemon juice • crushed red pepper flakes (to taste) • Freshly ground black pepper • Reserved pasta cooking water • baby bella mushrooms, halved or quartered • fresh green beans, trimmed •