Prepare pasta according to package directions; drain.

Cook bacon in a medium, non-reactive (non-aluminum) saucepan over medium-high heat until it has browned lightly. Pour off any excess fat.

Add onions, garlic and zucchini and saute over medium heat until soft, about 8 minutes. Add tomatoes and break up with a fork. Add corn and salsa. Bring to a simmer and cook slowly for 20 minutes, stirring occasionally. Toss sauce with cooked pasta and serve.