Hungarian Chicken Goulash

Name: Hungarian Chicken Goulash
Ingredients: * 2 tablespoons extra virgin olive oil; * 1 tablespoon butter; * 2 large yellow onions, chopped; * 5 cloves garlic, minced; * 6 yellow or orange bell peppers (or a combination of the two), chopped; * 3 tomatoes, diced; * 3 chicken breasts (about 1½ pounds), cubed; * ¼ cup sweet Hungarian paprika; * 3 chicken bouillon cubes; * ½ teaspoon caraway seeds, crushed; * 2 bay leaves; * 1 teaspoon crushed black peppercorns; * Salt and pepper to taste; * Sour cream