Combine first 3 ingredients in a plastic or paper bag; shake to mix. Place 2 or 3 pieces of chicken in bag; shake well. Repeat procedure with remaining chicken.
Heat 1 inch of oil to 325° in a large skillet; add chicken, and cook 15 minutes or until golden brown, turning occasionally. Drain on paper towels, and set chicken aside.
Place 1/2 cup flour in a small skillet; cook over low heat, stirring constantly, until flour is browned
Melt butter in a Dutch oven over low heat; add browned flour, stirring until smooth. Cook 1 minute, stirring constantly. Gradually add broth and wine; cook over medium heat, stirring constantly, 15 minutes or until thickened and bubbly.
Add chicken, onions, carrots, mushrooms, salt, pepper, and hot sauce to white sauce in Dutch oven; mix well. Cover, and cook over low heat 20 minutes. Add tomatoes and Brussels sprouts, mixing well. Continue cooking, covered, an additional 15 minutes. Stir in brandy, and simmer 10 minutes. Spoon chicken mixture over Holland Rusk biscuits, and garnish with chopped parsley.