Beef and Red Pepper Angel Hair Pasta

Name: Beef and Red Pepper Angel Hair Pasta
Ingredients: 10 ounces beef sirloin steak or boneless beef top round steak; ½ teaspoon salt; ½ teaspoon black pepper; 4 teaspoons canola oil; 1 medium red sweet pepper, seeded and chopped; 1 medium onion, chopped; 1 medium tomato, seeded and chopped; ½ cup shredded, peeled sweet potato; 3 cloves garlic, minced; 1 ounce goat cheese (chèvre), cut into small pieces; 5 ounces whole-grain angel hair pasta or angel hair pasta; 4 medium green onions, thinly sliced; 2 tablespoons fresh parsley leaves (Optional)