1 onion, sliced thin
1 garlic clove, minced
1 green bell pepper, cut into strips
1 tablespoon olive oil
1/2 pound skinless boneless chicken breast, cut into 1/2-inch-wide  strips
1/2 pound sweet or hot Italian sausage links, cut crosswise into 1/2-inch-thick pieces
a 14-to-16 ounce can tomatoes, chopped, including the juice
1/4 cup dry red wine
1/2 teaspoon dried orégano, crumbled
1/4 teaspoon dried basil, crumbled
1/4 teaspoon sugar
3/4 pound spaghetti
1/4 cup heavy cream