Preheat the oven to 175 degrees C. Melt butter in a large frypan over medium heat. Saute zucchini in butter until tender, about 10 minutes. Set aside.
In a large frypan, cook the mince, onion and jalapeno, stirring until beef is evenly browned. Drain off grease. In a large bowl, mix together the zucchini, eggs and mayonnaise. Stir in the mince mixture and cheddar cheese. Season with salt and pepper. Pour into a 23x33 cm casserole dish, and sprinkle crushed dry biscuits evenly over the top.
Bake for 20 minutes in the preheated oven, until heated through and the top is nicely browned.
This was a very tasty casserole and great way to use some zucchini I had on hand. I used jarred japs since it's what I had and it still tasted great. I'd say it was fairly spicy but not too much, great for those who enjoy a little kick from jalapenos! I also found that by slicing the onions rather than chopping them gave a better texture to the dish. Good, easy recipe! - 23 Sep 2011