Savory oatmeal bowl with mushrooms, spinach and fried egg

INGREDIENTS

2 handfuls

Baby spinach

4 oz

Button mushrooms, white

2 tbsp

Onion

Egg, large

1/3 cup

Rolled oats, old-fashioned

Salt and black pepper

1/2 tsp

Olive oil, extra-virgin

2/3 cup

Water

For serving (optional): Parmesan or mozzarella cheese, hot sauce, red pepper flakes