1 whole chicken (about 4 pounds), cut into pieces
2 tablespoons olive oil
1 large onion, chopped
3 celery stalks, sliced
4 cloves garlic, minced
1 can (14.5 ounces) diced tomatoes
8 cups chicken broth
2 cups fresh spinach, chopped
1⁄2 teaspoon black pepper, plus
extra black pepper, for chicken breasts (divided)
2 teaspoons kosher salt, plus
extra kosher salt, for chicken breasts (divided)
4 teaspoons butter
1⁄2 teaspoon dried tarragon
1⁄2 teaspoon dried oregano
2 teaspoons sweet Hungarian paprika
1⁄2 cup all-purpose flour, plus
2 tablespoons all-purpose flour (substitue GF, if needed)
3⁄4 cup fat-free evaporated milk