Preheat oven to 350 degrees. Grease a 9x13-inch baking dish with butter. Make sure you coat both sides and the bottom. In a large skillet, sauté onions in 1/2 cup melted butter stirring and flipping occasionally. Spread the sauteed onions over the bottom of the dish. In a large bowl, mix together the 1/2 and 1/2, eggs, salt and pepper until fully combined. Pour this mixture over the onions. Sprinkle the shredded cheese evenly over the top. Bake for 30 minutes.
Meanwhile, break up 1 sleeve of ritz crackers. Melt 3 tablespoons of butter. Add the broken crackers to the butter mixture. After the casserole has cooked for the initial 30 minutes, sprinkle this on top of and cook an additional 5 minutes. Enjoy!
Ingredients:
4 large Vidalia onions, sliced
1/2 c butter, 3 Tbs. + 2 Tbsp for greasing dish
1 sleeve Ritz crackers
2 cups of 1/2 and 1/2
3 large eggs
1 cup Sharp Cheddar Cheese
1 cup Swiss Cheese
1/2 teaspoon salt
1/4 teaspoon black pepper