Meanwhile, start the sauce by adding 2 tablespoons of olive oil to a large pan. Add the onion, bell pepper, the whole garlic clove, and ½ teaspoon salt. Cook until softened, about 2 minutes over medium heat. Then add the wine and reduce for a minute. Add the tomatoes, Italian seasoning, black pepper, an additional ½ teaspoon salt, and red pepper flakes. Turn the heat to medium-low and gently cook for 5 minutes. Next, turn the heat to low and add the zucchini, and blanched asparagus and broccoli.
3 teaspoons kosher salt, 2 tablespoon olive oil, 1 small onion, 1 small red bell pepper, 1 clove garlic, ⅓ cup dry white wine, 12-15 cherry or grape tomatoes, 1 ½ teaspoons Italian seasoning, Pinch black pepper, Pinch red pepper flakes, 1 small zucchini