Chili Mac

This is one of my daughter Erica's favorite dishes and an easy way to feed a crowd on a budget. To dress this up, offer chopped onion, diced avocado, sour cream, sliced olives  and tortilla chips so everyone can top their own serving as they like.

1 pound lean ground beef or turkey
1 reg size can whole kernel corn
1 envelope taco seasoning
1 cup pitted black_olives , roughly chopped
1 large can diced tomatoe's , undrained
1 large yellow onion , diced
1 (1 lb) can chili with beans
1 (1 lb) can kidney_beans
1/2 tsp ground ground oregano
Salt and pepper to taste
2 tsp chili_powder
1 tsp garlic_powder
1/2 tsp salt or to taste
3 tbsp olive_oil
1 package (2 cups) rotini pasta (or elbow macaroni)
1 1/2 cups shredded cheddar cheese
2 to 21/2 cups lightly crushed tortilla chips