Cook the Chicken Tenderloin:
– Season the chicken tenderloin with salt and pepper.
– Grill or pan-sear the chicken on medium heat for about 5-6 minutes per side, until cooked through and slightly golden on the outside.

Prepare the Egg:
– Fry the egg sunny-side up in a non-stick pan until the whites are set and the yolk is still runny.
– Season with salt and pepper.

Sauté the Vegetables:
– In a separate pan, sauté the sliced mushrooms until golden brown.
– In the same pan, sauté the spinach just until wilted. Season with salt and pepper.

Assemble the Plate:
– On a large plate, place the cooked chicken tenderloin.
– Arrange the sautéed mushrooms and spinach around the chicken.
– Add the fried egg and diced avocado on the side.

Garnish and Serve:
– Squeeze a lemon wedge over the chicken for a burst of freshness.
– Serve immediately and enjoy this vibrant, nutritious breakfast!

Tips:
– Add some herbs like cilantro or basil for extra zest.
– Pair with a slice of whole-grain toast or quinoa for extra fiber.