roasted tomato vinaigrette — Les Petites Gourmettes

Ingredients

• 2 pints cherry tomatoes, divided
• 2 garlic cloves, peeled and smashed
• 1/4 cup extra-virgin olive oil, plus additional for drizzling
• Kosher salt and freshly ground black pepper, to taste
• 1 tablespoon Sherry vinegar or red wine vinegar
• 1 teaspoon Dijon mustard
• 1 teaspoon sugar
• Handful fresh parsley leaves
• 1 tablespoon salt (for water)
• 1 pound trimmed haricots verts (slender French green beans)