Chicken Parmesan Bake

2 boneless, skinless chicken breasts, cut in 1-inch chunks
1 TBL olive oil
1/2 tsp garlic powder
1/4 tsp onion powder
1/2 LB pasta, cooked and drained
2 cups marinara sauce (reserve 1/2 cup)
1 cup mozzarella, shredded (reserve 1/2 cup)
2 tsp Italian seasoning (or 1 tsp each basil and oregano)

Season chicken chunks with onion and garlic powder and saute in olive oil until brown on both sides.
Mix cooked pasta with chicken, 1 1/2 cups sauce, and 1/2 cup cheese in greased casserole dish.
Top with remaining sauce, then cheese and Italian seasoning.
Bake, covered, at 350 for 20 minutes, removing the lid for the last 5 minutes.
MAKE-AHEAD: Stop at the baking step. Bake 45 minutes from refrigerated.