Grease casserole and layer the following 2 or 3 times, depending on how many you wish to serve:

1. Peeled and sliced zucchini.

2. Chopped onions (about 2 medium or 1 large for entire dish).

3. Flour, sprinkled sparingly.

4. Layer of sliced Velveeta cheese. Omit flour if other cheese is substituted.

Bake at 325 degrees for 30-45 minutes.