When Wonder Bread hit the market in Indianapolis in 1921, it truly was a wonder: The loaves were larger than the ones Americans were accustomed to, and the revolutionary plastic packaging and addition of preservatives prolonged the bread’s shelf life. In 1930, pre-sliced loaves became available, changing the world of sandwiches forever. Sliced Wonder Bread is also great in this strata; its spongy texture is perfect for soaking up the eggs and milk.
02Combine bread and milk in large bowl. Let stand until milk is absorbed, about 15 minutes.
03Whisk half and half and next 6 ingredients in medium bowl to blend. Stir in goat cheese.
04Place half of bread mixture in single layer in prepared glass baking dish (bread will not cover bottom of baking dish). Top with half each of mushrooms, Parmesan cheese, Fontina cheese, and half and half mixture. Repeat layering with remaining bread, mushrooms, Parmesan and Fontina cheeses, and half and half mixture. (Can be prepared 1 day ahead. Cover and refrigerate.)
05Bake strata uncovered until firm in center, puffed and golden, about 1 hour.