Baked Ziti With Spinach

itemscope itemtype="http://data-vocabulary.org/RecipeIngredient"> 8 ounces uncooked ziti (short tube-shaped pasta) 1/2 cup hot water 1 (12-ounce) bottle[...]

1 tablespoon vegetable oil 1 cup chopped onion 1 cup chopped green bell pepper 1 cup chopped red bell pepper 1 1/2 cups chopped portobello, cremini, or button[...]

Salt and pepper 8 ounces hot Italian sausage, casings removed 2 tablespoons unsalted butter 2 tablespoons all-purpose flour 2 cups milk 8 ounces ziti 1 1/2[...]