Sweet Onion & Zucchini Bake

From Coming Home with Gooseberry Patch. I've tried this recipe twice now and it's been a hit both times. Plus, it's really quick and easy.

1/4 c. butter
3 c. sweet onion, thinly sliced
3 c. zucchini, thinly sliced
2 eggs, beaten
1/4 c. half-and-half
1 t. salt
1/8 t. pepper
1/4 t. dry mustard
1 c. swiss cheese, shredded (I used the Italian blend pre-shredded in a bag)

Melt butter in a large skillet over medium heat; saute onion and zucchini until tender. Arrange vegetables in a lightly greased 8x8 baking pan.
Comnbine eggs, half-and-half, salt, pepper, mustard, and 1/2 c. cheese. Bake at 375 degrees for 20 minutes, or until center is set.
Makes 6-8 servings.