This easy to make Spinach Casserole is a great way to add a green vegetable side to your main course. It's also rich enough that you can even skip a side starch dish. This casserole pairs perfectly with any protein, including beef, chicken, pork or turkey.
Thaw spinach. (I typically place the spinach packages in the refrigerator to thaw the day before I prepare the casserole.) Remove spinach from package and press the liquid out. You may use cheese cloth or paper towels for this and perform this step in the sink.
Put drained spinach in a microwave-safe mixing bowl. Cut the butter into three individual pats and add to the top of the spinach.
Microwave the spinach on at "9" power for six minutes.
Once the spinach has been microwaved, add the onion salt, garlic salt and Greek yogurt (or sour cream) and mix well.
Add the shredded cheddar cheese to the mixture and mix well.
Spread the spinach mixture in the baking dish.
Sprinkle bread crumbs on top.
Bake at 350 degrees for approximately 45 minutes.