Vegetables - My Favorite Dinner Party

Ingredients

• Nonstick vegetable oil spray
• 1/2 cup whole grain Dijon mustard
• 2 tablespoons extra-virgin olive oil
• 2 tablespoons (1/4 stick) butter, melted
• 2 tablespoons fresh lemon juice
• 3 garlic cloves, minced
• 1 tablespoon dried oregano
• 1 teaspoon finely grated lemon peel
• 1 teaspoon coarse kosher salt
• 3 pounds 1- to 1 1/2-inch-diameter mixed unpeeled red-skinned and white-skinned potatoes, cut into 3/4-inch-wide wedges