1In 10-inch skillet, cook beef over medium-high heat 5 to 7 minutes, stirring frequently, until thoroughly cooked; drain.
2Stir in hot water, milk, sauce mix and uncooked pasta (from Hamburger Helper box) and pepper flakes. Heat to boiling, stirring occasionally.
3Reduce heat; cover and simmer 8 minutes. Stir in 2 tablespoons of the French-fried onions, the bell pepper and ketchup.
4Cover; simmer about 8 minutes, stirring occasionally, until pasta is tender. To serve, sprinkle with remaining onions.