Caramelized Onions and Cavatelli

Cook pasta according to package directions, except omit any oil or salt. Drain. Return pasta to hot saucepan; cover and keep warm.

Meanwhile, in a heavy large nonstick skillet, heat oil over medium-low heat. Add onion to skillet; cover and cook for 13 to 15 minutes or until onion is tender. Sprinkle with sugar. Cook, uncovered, over medium-high heat for 4 to 5 minutes more or until onion is golden brown, stirring frequently.

Add zucchini and garlic to onion in skillet. Cook and stir for 2 minutes. Stir in the water, balsamic vinegar, and dried thyme (if using). Cook for 2 to 3 minutes more or until zucchini is crisp-tender, stirring occasionally.

Add zucchini mixture, nuts, and fresh thyme (if using) to cooked pasta; gently toss to combine.