Cut a slice of sourdough bread diagonally to get a wider surface.
Drizzle olive oil on both sides, then rub it evenly with your hands. Season with a pinch of salt and black pepper.
Place the bread on a preheated grill and toast until golden and crispy on the outside while remaining soft inside, flipping as needed.
In a bowl, add the avocado flesh. Mash it roughly with a fork to keep a slightly chunky texture.
Add lemon juice, salt, black pepper, cumin, chopped cilantro, and olive oil.
Mix everything well and set aside.
Prepare the dressing by adding mustard, balsamic vinegar, olive oil, salt, and black pepper into a jar.
Shake well until fully combined.
In a separate bowl, toss the mixed baby greens with the dressing and set aside.
Peel the boiled egg and slice it into thin rondelles using an egg cutter or knife.
To assemble, place the toasted bread on a serving plate.
Spread the avocado mixture evenly on top.
Arrange the egg slices over the avocado.
Finish by sprinkling pomegranate seeds, pumpkin seeds, and sunflower seeds on top.
Serve with the dressed greens on the side.