Prepare Meyer Lemon Chicken through step 3, decreasing potatoes to 12 ounces, omitting lemons and shallots, and substituting 2 cups (1/2-inch-thick) slices carrot, 2 cups (1/2-inch-thick) slices celery, and 1 large red onion, cut into 12 wedges. Cook vegetables for 10 minutes, stirring occasionally. Substitute 1 tablespoon chopped fresh oregano for thyme. Return vegetable mixture to pan. Combine 1 1/2 cups unsalted chicken stock and 2 teaspoons cornstarch. Add stock mixture, 1/2 teaspoon kosher salt, and 1/4 teaspoon black pepper to pan; bring to a boil. Cook 1 minute. Stir in 2 tablespoons butter and 1 tablespoon fresh lemon juice. Return chicken to pan. Sprinkle with 1 tablespoon chopped fresh parsley.