1Heat oven to 375ºF. Cook and drain noodles as directed on package.
2Cook beef, onion, cilantro and red chilies in 10-inch skillet over medium heat 8 to 10 minutes, stirring occasionally, until beef is brown; drain.
3Place 5 of the noodles in bottom of ungreased rectangular baking dish, 13x9x2 inches. Layer with 1 1/2 cups of the beef mixture, 1 cup of the ricotta cheese and 1 1/4 cups of the salsa. Repeat with remaining noodles, beef mixture, ricotta cheese and salsa. Sprinkle with Monterey Jack cheese.
4Bake uncovered 35 to 40 minutes or until hot. Let stand 10 minutes before cutting.