Cauliflower Steaks with Chimichurri

Name: Cauliflower Steaks with Chimichurri
Ingredients: 2 tablespoons extra-virgin olive oil; 2 cloves garlic, minced; 1 tablespoon minced jalapeño pepper; ¾ teaspoon salt, divided; 2 tablespoons finely chopped fresh oregano; 2 tablespoons finely chopped fresh thyme; 2 tablespoons water; 2 teaspoons sherry vinegar; ½ teaspoon paprika; Olive or canola oil cooking spray; 1 large head cauliflower (about 3 pounds); Freshly ground pepper to taste; 3 tablespoons finely chopped flat-leaf parsley