Heat a large skillet or griddle to medium heat. Add a bit of cooking oil and distribute it evenly in the pan. Add the hashbrowns (straight from frozen), sliced mushrooms, sausage (straight from frozen) and tomatoes. Cook until done to your liking, flipping and turning as needed.
How to Perfectly Fry Eggs
Heat a dab of oil on a nonstick skillet over medium low heat. Carefully crack the egg onto the pan – it should sizzle. Add a dash of salt and pepper. For sunny side up, cover with a lid for a minute or two until the yolk is cooked to your liking. For over easy, cook uncovered and flip after a minute or two and cook until the yolk is cooked to your liking.
Warm the baked beans, plate everything and grind salt and pepper over everything.