Summer Squash and Red Quinoa Salad with Walnuts

1/2 cup red or other quinoa, rinsed in a fine-mesh sieve, drained 2 teaspoons kosher salt plus more for seasoning 1 pound assorted summer squash 2 tablespoons[...]

1 tablespoon extra virgin olive oil , plus more for drizzling 1 garlic clove , minced all-purpose flour , for dusting 6 ounces pizza dough 1 pinch crushed red[...]