Baked Oatmeal

My mom's recipe...I love it hot OR cold, with milk! I think I usually double this?

Ingredients:
1/3 cup vegetable oil
1/2 cup brown or white sugar
1 large egg, beaten
2 cups uncooked oats
1 1/3 tsp. baking powder
1 tsp. salt
2/3 cup milk

Directions:
Combine oil, sugar, and egg. Add oats, baking powder, salt and milk. Pour into a greased casserole dish. Bake at 350 for 30-35 minutes.