Confetti Egg Strata!

This is the egg dish served at Becca's shower. :)
12 eggs, beaten
3 1/2 cups milk
1 T. dry mustard
1/2 t. salt
1/4 t. pepper
12 slices white bread, cubed
1 1/2 c. cubed ham
2 c. shredded sharp cheddar cheese
1 c. sliced mushrooms
1/2 c. finely chopped onion
1/2 c. chopped green pepper
1/2 c. chopped red pepper
1 jar (4oz) sliced pimentos (I leave these out and use the red pepper instead)

Preheat oven to 350*
Beat eggs, milk and seasonings in large bowl. Add remaining ingredients
and stir to combine. Pour into lightly greased 9x13 baker, cover with plastic, and refrigerate
overnight. Bake 1 hour and 15 minutes or until set and golden on top.
Yield- 10-12 servings