Step 1

In 12-inch nonstick skillet, cook beef, mushrooms and bell pepper over medium-high heat 10 to 12 minutes, stirring occasionally, until beef is no longer pink; drain.

Step 2

Add milk, hot water and sauce mix (from Hamburger Helper™ box); stir to combine. Stir in uncooked pasta (from Hamburger Helper™ box). Heat to boiling, stirring occasionally. Reduce heat; cover and simmer 9 to 11 minutes, stirring occasionally, until pasta is tender and sauce is thick. Remove from heat.

Step 3

Gently stir in cheese; cover and let stand 2 to 3 minutes or until cheese is melted.