Soak chilis in hot water for 15 minutes until soft. Toast peanuts, sesame, garlic and cumin in a pan until fragrant/toasted. Add everything except olive oil to robo coupe and pulse until broken down. Drizzle in olive oil to form a sauce.
Rinse onions under cold water and dry on paper towels. Toss with cornstarch and fry in 350F fryer until crispy. Remove onions from fryer and place on paper towels. Add spices and salt, toss to coat.
Heat a heavy bottomed pan over medium heat. Season the steaks on all sides with a generous amount of salt and pepper. Once the pan is hot add the oil then the steaks. Cook the steaks on one side for about 3-4 minutes or until a nice crust forms, flip and repeat on the second side. Cook to an internal temperature of 120F and remove from the pan to allow to rest. Allow the steak to rest for 5 minutes. While the steak is resting, place half of the salsa macha in the center of each plate. Place the rested steak on top of the salsa macha then top with crispy onions, garnish with chopped parsley.