Roast Chicken without petals dressing

1/4 cup drippings from a roast chicken 2 1/2 tablespoons all-purpose flour 2 cups cold chicken stock, or more if needed salt and ground black pepper to taste[...]

1 (3 1/2 lb) chicken , cut into 8 pieces 1 lb small red potato , each cut into quarters 1 small red pepper, cut into 1-inch pieces 1 small yellow pepper, cut[...]