Place the contents from the large bag into a greased casserole dish.
Top it with the shredded cheese and crispy onions from the smaller bag.
Cook in a 350° oven for 20-25 minutes.
Note that this recipe makes 3 meals. I usually double it so that it makes 6 meals. For this meal, you'll want to prep the chicken and rice ahead of time to make the assembly go quickly. When I'm assembling freezer meals, I cook larger quantities of chicken by placing them on a baking sheet and putting them in a 350° oven for 45 minutes before cubing.