Begin by preheating your oven to 425°F (220°C) so it's ready for baking.
With a sharp knife, carefully slice the avocados in half lengthwise and remove the pit gently. If you find that the cavity isn't large enough to hold the egg, use a spoon to scoop out a small amount of avocado flesh, creating adequate space.
To ensure stability while baking, nestle the avocado halves upright in a muffin tin. This will prevent them from tipping over during the cooking process.
Crack an egg into each avocado half, taking care to prevent the egg whites from spilling over the sides. If your avocados are smaller, consider using medium-sized eggs for a better fit.
Evenly distribute the diced cherry tomatoes and finely chopped red onion over the eggs, adding vibrant colors and flavors to your dish.
Season the tops of the eggs with a sprinkle of salt and pepper. If you enjoy a bit of a kick, feel free to add red pepper flakes according to your heat preference.
Place the muffin tin in the preheated oven and bake for approximately 12-15 minutes. Keep an eye on them to achieve your desired egg doneness—longer for firmer yolks, shorter for runny ones.
Once they are baked to perfection, carefully take the muffin tin out of the oven and allow the avocado egg cups to cool for a minute or two.
Just before serving, garnish your lovely breakfast cups with fresh cilantro for a burst of color and freshness.
Notes
Serve with whole-grain toast or a fresh side salad for a complete meal.