1. Cook pasta according to package directions.
2. Meanwhile, heat 2 tbsp. olive oil in a large frying pan over medium heat, add garlic, and sauté until fragrant, 1 minute. Add broccoli, 3/4 cup water, and 1/2 tsp. salt. Cover; cook until broccoli is tender.
3. Stir in walnuts, zest, and juice of 1/2 lemon, then toss with drained pasta. Add more salt, lemon juice, and olive oil to taste. Serve with cheese.
Note: Nutritional analysis is per serving.