1/4 cup fresh basil leaves, torn
1/2 cup walnuts, toasted
1/2 cup flat-leaf parsley leaves
ground black pepper
6 tbsp. extra-virgin olive oil
1 tbsp. Sherry vinegar
2 tbsp. fresh lemon juice
1 tsp. finely grated lemon zest
2 1/4 tbsp. finely grated Parmesan
1 pound assorted summer squash
2 tsp. kosher salt
1/2 cup red or other quinoa