Directions

1. Preheat oven to 425 degrees. In a small bowl, whisk together cornmeal, 1/2 cup flour, baking soda, and 1/2 teaspoon salt; set aside.
2. In a large ovenproof skillet, heat oil over medium-high. Add peppers, onion, and mushrooms; season with salt and pepper. Cook until tender, 6 to 8 minutes, tossing occasionally.
3. Raise heat to high; add beef and tomato paste. Cook, stirring, until meat is no longer pink, 3 to 5 minutes. Stir in remaining 2 tablespoons flour and 2/3 cup water; season with salt and pepper.
4. Make cornmeal batter: Add sour cream and egg to reserved cornmeal mixture; stir just until moistened. Drop tablespoons of batter over beef mixture in skillet, 1 inch apart. Bake until biscuits are golden brown and a toothpick inserted in center comes out clean, 15 to 20 minutes.