Yellow Squash Casserole

0 Preheat the oven to 350F.
2 Grease an 8x8 inch baking dish or a 1 1/2 quart casserole
4 Melt 2 tablspoons or so of the butter and the olive oil in a heavy skillet.
6 Saute squash for about 5 to 10 minutes. If you are using fresh onion and pepper add it with the squash.
8 Cover, reduce heat, and steam until very soft, stirring often.
10 Remove from heat and let stand in a colander for a few minutes to drain any excess liquid.
12 Add to a large bowl.
14 Mix in the sour cream to cool it down a little.
16 Add the 1 1/2 cups Cheddar cheese and the beaten egg.
18 Mix well.
20 Spoon into the greased casserole.
22 Top with crumbs and cheese.
24 Dot with remaining butter.
26 Bake for 30 -35 minutes, until the top is golden and the casserole is firm to the touch.