Dede's Broccoli Casserole

I got this recipe from a friend from Georgia many years ago. Delicious. I'm just guessing at the pan size, temperature, timing and servings as they weren't provided and some of the steps were unclear...hope I got it right.

• Ready In: 45 mins
• Serves: 6-8

Ingredients

• 1 -1 1⁄2 lb fresh mushrooms, sliced
• 1  small onion, diced
• 1  cup  cracker barrel mellow-med cheddar cheese
• 1 (10 3/4ounce) can  cream of mushroom soup
• 2  eggs
• 1  lb broccoli, 1 inch pieces
• 4  ounces  Ritz crackers, coarsely crumbled (you only need 1 package)
• 4  ounces Velveeta cheese, grated

Directions

1. Saute onions and mushrooms together.
2. Melt Cracker Barrell cheese with mushroom soup.
3. Beat eggs and add to broccoli. Then add to mushrooms and onion mixture.
4. Place in 9x13 inch baking dish.
5. Top with Ritz crackers and Velveeta cheese.
6. (Optional: top with crackers and melted butter).
7. Bake at 350 degrees for 20-30 minutes.