Preheat the oven to 375 degrees Fahrenheit.
Cook and crumble the ground beef in a large skillet over medium-high heat for 2 minutes.
Add the diced onions and cook 5 minutes more until beef is browned and onions softened, then drain grease.
Stir in the Manwich sauce, chicken broth, and undrained diced tomatoes, then bring to a gentle boil.
Add the uncooked farfalle pasta and stir to combine. Cover and boil gently until pasta is al dente, stirring occasionally.
Reduce heat to low, stir in the corn, then add Velveeta cheese cubes. Cover and let cheese melt, stirring gently to combine.
Transfer the mixture to a lightly greased 9x13 inch casserole dish.
Top with shredded cheddar cheese, cover, and bake for 15 minutes.
Remove cover and serve warm, ideally with cornbread.